Is there a second floor? Basement?

with this limited info, I think your best move might be to turn the office into a kitchen and turn the kitchen into an ensuite bath for the front bedroom.

Yes, there is a second floor bedroom and bathroom directly above what I have labeled as bedroom/office. The current bedroom/office and sunroom/dining room have concrete floors (I'm assuming they were previously a large porch), so they would be much mroe expensive for renovations than the original floorplan that is off grade

Where’s the plumbing for the upstairs bath? I wouldn’t give up on a good kitchen location before exploring it. It looks like previous owners may have taken the easy route with additions, let the good design begin with you!

Plumbing is in a chase between the two rooms (next to the stairs), see pic below. Would you combine the bathroom and kitchen for one large master bathroom / closet? or are you suggesting leaving the existing bathroom as is and having a second bathroom on the first floor? Only other potential issue I see with this is that we'd be removing one of the three bedrooms. Not needed for our family at the moment, but I wouldn't want to take away from the value of the home for future sale. This isnt forever home for us, more like 5-10 years.

Can you add some dimensions to the floor plan? Does the sunroom have insulation/HVAC?

The floor plan that is shown on grid paper is roughly to scale. 1 square is 1sqft (sunroom is 20 x 9, living room is 22 x 16, etc.) I can put sqft on the drawing when I get to my computer later if needed).

As far as budget goes, definitely less than $100k (ideally closer to $50k). Labor is not very expensive where we live and I have discounted material options. That is why I initially thought switching kitchen and bathroom would be most economical since it’s off grade and would mainly just be removing interior walls that aren’t load bearing.

You can’t buy the materials for this for 50K. Not even at a discount. The average mid grade kitchen is 13K more than that. And a 50K master bath too? Plus you've got a massive amount of electrical and plumbing moving. And that’s if you have access through a basement. No electrician works for $20 an hour anywhere.

150K is pretty bottom line pricing for people that know what they are doing and have the licenses and insurance to prove it.

The wild idea needs to get tamed.

http://www.remodeling.hw.net/cost-vs-value/2018/

I have remodled two houses here and know the costs, was really looking more for layout ideas. I wasn’t sure if the space was large enough to have it work.

I hire out the subs for electrical and plumbing and do most of the rest myself with the help of handy friends.

House was only $235k, so not on the same scale as $50k+ kitchen projects.

If you make the switch, how much space would be available for the kitchen?

I thought it would make more sense to basically turn the bathtub alcove into a hallway to two bedrooms and a bath. It's not clear where your laundry is, so I thought maybe a back hall with a laundry closet would be nice. This, of course, hinges many many things including putting the kitchen in the back next to the living room.

Rantontoo: Kitchen space would be determined by the size of the "master" bath. I was initially thinking the bathroom would be 9 by (7 or 8). Kitchen could be either (9 or 12) by (8 or 10) (Depending on what I do with the existing pantry and bedroom closet. )

Benjesbride: I like that layout much better than what I've got. The sunroom's exterior walls are a line of windows looking out to the back and side yard. To make it work as a bedroom, we'd need to close off some and try to match exterior brick (which I fear to be too large of a project for me to afford). Laundry is currently in an accessory structure out the back door from the right side of the sunroom. Interior laundry would be a great addition!

Is the whole objective of you idea to get the kitchen open to the living room? If so, I don't see the cost/benefit of that. You're still left with a funky overall layout.

Yes, that was the idea. I cook a lot and like to entertain, hate being closed off in a separate room.