^^^ believe it or not, if you stay up with it even weekly, pulling crabgrass by hand is easy and effective. Growing up, we serviced a client who had the most amazing lawn and would not allow chemical treatments, so every week after mowing we'd walk the property and pull any crabgrass. It took two of us 5 minutes per week to do a quarter acre. Easy. I just read through the other stuff you're looking to do, You're trying to pack a LOT of differing functions into a small space. Have you used the "find a local pro" feature here to find a landscape designer? You'll want to find someone skilled with space planning, who also understands deck and porch construction from what you've listed. There's not a lot of us but we're out there. If you can find that person in your area it'll be well worth it.

Thanks for the replies. I don't think we want to go with "faux", we would like real plants. I have never heard of creeping thyme. Can one walk/ run/play on it?

If you have horses you need to consult someone about setting up proper pastures for them on your acreage. You do need to be careful how much grass they get and what kind of grass it is and the time of year, but if you get set up nicely then they can graze a fair amount of the time and it will cut back your feed bills. The thing is that you'll want at least two pastures for proper pasture management, if not more. (Depends how many horses you have, if they can all go out together, etc.) But the idea is that you can move them between pastures so none of the pastures ever get eaten right down to bare ground. There is still some work required in the pastures, spreading manure and so on, but before you do anything else with landscaping I'd look into the pasture needs to make sure you don't spend money on anything that will be not suitable for using the land for pasturing, or will mean duplicating equipment. I would also advise caution with renting out the barn - hang out on any online horse forum and you will hear plenty of horror stories and a laundry list of problems that can come up. Some people obviously do it happily, but I would definitely do plenty of research before going down that road. (And yes, you will likely have to get additional insurance.) You want to know what you're getting into and have a good agreement in place and an understanding of the costs. (In addition to insurance, horses can be very hard on buildings and fencing, so you need to make sure that your agreement either stipulates how things are to be maintained and how things are paid for if the person doesn't keep things in shape, or be charging enough to pay for doing the needed maintenance yourself.) If you are interested in renting out, the idea of using it as a hay field is probably one of the most promising - you might still need extra insurance to cover yourself against any accidents that might happen on your property during farming, but if people in your area do hay then you are likely to find a taker and hay costs are high enough that many people would be pretty happy to have some extra land or to grow their own.

Hard to tell from a pic online. Here's a link for Oklahoma's county extension service. Extension is staffed with horticulturists as well as volunteer Master Gardeners and they are there for YOUR questions. Find the office closest to you and they'll have the most relevant, accurate info for you.