Obviously, if I can afford to buy a house, I can afford to lend them $200 til payday, so I should lend it to them. 

IMO if the first tenant would ask you if they could change their due date because of their payday I would do it for them.

You get a payday when ...A) You have a cash flowing propertyB) You have a property that you can sell for more then you owe.Both of these happen Faster when you buy something that can be rented on Day One.

Just rent it out short term to an attorney, dentist, office etc. and then let the developers come a knocking to buy you out at a premium.It's a huge advantage to know land development as what someone else sees as a massive issue for residential I know it will be a huge payday for commercial when the transition happens.

Focus on your own payday. 

I've watched a few friends do well with overages, however they seem to like the research and stealthiness aspects of the business and pay days come in chunks.

I think it is MUCH more likely for the wholesaler to make an offer, an uneducated seller thinks ok I guess that's what my house is worth, then the contract get's assigned so the wholesaler doesn't have to actually close or they double close and in either case walk away with sometimes surprisingly large paydays.

Anyone holding out waiting for some payday or vindication has a unrealistic view of how these type of things turn out. 

They were moving from Wisconsin to Oregon and just didn't have the cash to cover the move and rent + deposit until the first pay day.

Then a loan, another loan, then in an emergency when no bank loans were avail, I turned to the payday loans which is 257% apr no joke (borrow $1000 payback $3000).