Where do you plan to put the tiny home?
Space in an RV park will run you somewhere between $400-$700, plus you probably will have to pay your electricity. You can "boondock" in a COA park for anywhere from free (no utilities) to maybe $5 a night (still no utilities). You might find a state or county park for $200-$400 a month, but you might have to move every 14 days.
A lot of people plan to put their tiny home on someone's property, but very few municipalities allow that. You might get away with it for a while, but the neighbors will eventually rat you out...LOL. You might be able to buy some cheap land waaay out in the boonies where there's not many restrictions, but do you really want to be 40 miles from a grocery store?
If you have a flush toilet, you'll need to be able to hook up to utilities (RV park). If you have a composting toilet, you're going to have to clean it out regularly. If you have a camping toilet, you're going to have to dump it quite often.
What are you going to do about electricity? Hook-ups mean staying somewhere with utilities. Solar panels aren't cheap and unless you have enough of them, you aren't going to be able to power much.
If you're going to have to move it around, you need the right kind of vehicle to pull it.
How about storage? That first tiny home looks like it has absolutely NO storage. No drawers for your clothes, no closet. It also doesn't have a real bed.
The second tiny house has more space, but do you really want to go up and down those steps to the "bedroom" and crawl into bed? That gets really old really fast.
Tiny homes are cute and trendy and very, very hip, but not very practical.