Welcome grasshopper, I can't think of any laws regulating wholesaling real estate, except to make these contracts binding and lawful there must be consideration, meaning, you need to pay the homeowner $1.00 Some states it might be more or you can even trade something, like your pocket knife. You can also get creative and write in the contract that a dollar or a $100 earnest fee will be paid at closing. I lost 500 buks on one deal and 200 on another so I just started to limit my consideration to $10, cuz one dollar cud be insulting.
If you speak to realtors, many or most will tell you that, wholesaling real estate with out a realtors license is illegal, but of course don't believe it and never take legal advice from a realtor.
If you have a signed contract with seller you have equitable interest, and you can sell everything from a $20 dog house to a multi million dollar mansion, legally.
Also you need some education, I can send you a free book.
Rando