We usually put up a small amount. somewhere between $10-$50.

The manager‘s payment is usually 10% of the rent right?

Your property inspection would turn up any issues relating to mold.In another words, you can factor in an extra $1000 in inspections for these areas, and include that either in your renovation or your fixed costs when analyzing the deal and coming up with your maximum purchase price. 

Usually go with non refundable down payment,  some type of monthly credit towards their purchase (only if negotiated ), buyer responsible for all repairs ( assuming home is in good condition when they are buying it) and if they are not able to execute at the end of the lease term offer an extension period with possibly a little more down payment. 

Kitchen and bath are included and 40' length is for the higher end of the cost 15k+ I'm dealing with the container home itself, foundation and slab usually taken care of by my partners and they just hires some experience local developer so I don't have more information on that at the moment. 

They have to apply, have a site visit, pass inspection (safety stuff usually) and then get certified for section 8.

I will have extra savings due to my low expenses and have been contemplating ways to invest it, and I always seem to come to the conclusion of real estate investing.

@Alonzo Mansel wholesaling is usually not a full time job if you are starting on a small scale  It is very possible that you could do both at the same time.

Great quality starter suits (Italian Mills, good fabrics & cloths) for $500-800 usually.

The second is that usually the ARV is higher than the purchase price if you are putting in money to fix up the property where yours is the same.