Hi NTT, I like your basic idea of making your garden wheelchair accessible. I can understand what you mean about not wanting to bring dirt inside on the wheels of your chair. My concern about your plan is that laying the 12 inch pavers may need to be more complicated than your plan. Generally, stones or pavers do not work well simply laid on a lawn covered by landscape fabric and newspapers. Usually, the grass is removed and layers of sand or coarse crushed stone. This allows for good drainage of your patio. Edges of the patio area are formed with timbers that are secured in place with deep stakes. One may also use conrete to pour curbs or edges to secure the sides of your patio. The reason for this is to prevent the paver stones from shifting. Then the pavers are laid on the leveled layer of sand and very fine sand is laid on top and forced between the pavers to hold them in place. Usually a machine is used to compact the sand bed before the pavers are laid and to vibrate the fine sand between the laid pavers. There are good reasons for doing a garden path or patio this way. Using your friend's method, you will have an uneven surface. The pavers will rock, and may eventually crack. The newspaper will degrade and loose dirt will get between the pavers, giving weeds a place to grow. Worst of all, the patio and paths will move, giving you an uneven surface to use your wheelchair on, and there will be very poor drainage. Water and movement can destroy your pavers. I know that in Houston you do not have to worry much about winter frosts making your pavers heave out of place, but you do have very wet times that will make the newspaper and dying grass soggy and slippery. That will mean your pavers move and you may get a wheel stuck in a crack between them. I know that it will cost a lot to hire someone to do a good job laying a patio and paths for your garden, but not doing it properly can ruin your investment in nice pavers and make your yard unusable. Another option for you might be to make nice raised beds that you can reach more easily. These are my favorite gardening catalogs and they have several ways to make raised beds. Gardener's Supply And Lee Valley Tools Here is a link that might be useful: This Old House instructions for pavers

You need clear space of 30" wide by 24" deep.

Check this website: https://www.nahb.org/en/learn/designations/certified-aging-in-place-specialist/related-resources/aging-in-place-remodeling-checklist.aspx. "Overall Floor Plan Main living on a single story, including full bath No steps between rooms/areas on the same level 5-foot by 5-foot clear/turn space in living area, kitchen, a bedroom, and a bathroom" You can also find an aging in place design specialist on this website.

Zulu Spillane, I gave up on a wheelchair-base vanity and designed my own. The ones offered for sale to the homeowner cost at least $3000, then are wall-hung with little storage. I dislike wall-hung because I still walk, with failing knees. I sometimes grab furniture and lean on it. I want things I lean on to have legs that contact the floor and to be sturdy enough to take the weight. Many wheelchair accessible vanities extend far out from the wall. That is so that if a person using foot rests with their legs elevated tries to wash their hands, they can reach the sink before their legs hit the wall. My bathroom did not have room for a deep counter as well as room to maneuver a wheelchair. Pick one, it became for me. I chose the floor space and a 16” deep countertop with a semi-recessed sink that comes out a bit from the counter’s edge on one end of the vanity. My vanity depth was also driven by the fact that increasing the door width to 36” took away depth from my counter space area. You can begin to see that each disabled person is disabled in their own unique way. One-size-fits-all solutions like ADA guidelines, therefore, do not tend to work well for individuals in standard sized homes. You do your best to meet current needs and try to predict and meet the future needs, as well. Store-bought wheelchair vanities often do not fit into our spaces. That leaves even fewer buyers for them, making them almost a custom item, with a custom price. I simply took the next step, and designed a truly custom vanity for my own needs and my space. Wall sinks like the ones above can be a great solution, as long as the disabled person can reach the controls and the water flow without smashing their knees, toes, or extended legs into the wall.