Mahesh, Most of us posting would be at a loss learning the culture and context of the use of landscape, space, gardens in another culture. I'm still "training" my husband, who grew up in an apartment in Vienna, austria. The American suburb thing is, well, weird in some ways. That being said, you seem to share some of the issues that many others have brought to this forum: 1. In your first post, at least, you were very uncertain about what you wanted. There are plenty of posts here that start out that way. You've come back with more info and I'm guesssing that people are going to ask you more questions. It's kind of a back and forth to see if the problem can be more clearly defined. 2. You also come with your own inner vision of what you want. You've let us know that it may have roots in your cultural background. Getting clearer about that picture will help your ultimate goal even if it doesn't much change the short term solution. Everyone who posts here comes with their "inner garden". For one person it might come from an idea of what's "right" for an American home. For another it comes from wanting a garden "Just like my grandmother's". For someone else it's cottage garden, or being unconventional, or For me there's this garden from my childhood in Melbourne, Australia. Space was understood and used differently than is common in the suburbs of the midwest, and I have to struggle with what I'd like to achieve from that favorite garden and what is practical in my garden today. 3. Getting realistic. That's another thing that you probably share with the rest of us. You need to be realistic about the money and the learning curve needed to understand and develop your property wisely. That steep learning curve is what you pay for when you locate a good landscape designer to help you implement what you want to do. Otherwise, you're the one who has to learn what will work, what will add value to your home, what will detract or help you if you ever have to resell this property. I can't really say anything about the appraisal issue that is pushing your short-term decision, but it's harder than you may think to achieve any good result in such a short time. (Unless you're willing to use big bucks to achieve a well-planned design. Of course, you would have to have a clear idea that a landscape designer could achieve for you.) For now, I'm guessing that the appraiser will be more interested in your furnace than in whether or not you've put down mulch, grass seed, or something else. Make your choice based on your long-range goal for landscaping your home. I'll close with a question. Can you describe what you mean by "hardscape"? I'm not that fond of grass, but I tend to replace it with flower beds, shrubs, trees, etc. It almost sounds like you want to turn your lawn into concrete? The immediate thought of many Americans to that solution would be "prison yard". You also use the expression "hardscape / garden", but I don't know what you mean by that. Can you clarify? Wellspring

It is for a slope that I have to drive on a few times a year. mostly shady , Grasses or anything that comes back year after year I live in 3-4 in Minnesota.

"How can sand enter a closed system? It would indicate a break ,right? Someone tell me Im right or wrong." Nothing you describe indicates a broken drain line. Everything points to a clogged drain line. Sand collects in the P-trap of the tub. It washes off people's feet. No mystery here. The pipes are clogged, not broken. When the washing machine drains, it backs up from the clog, which is downstream from where the bathroom and laundry drains converge. You need to have the lines snaked. I would bet the clog is in a 2" line, right before the Tee into the Main 4" line. This will be a difficult place to send the drain auger, unless there is a 2" clean out access. The washing machine standpipe would be the next best place to try.

Hopefully OP comes back as I was only answering based on the question they posted. I wouldn't be surprised if they already have a dance floor but want to cover the floor of rest of the space.