I even heard of a landlord being sued and losing and having to back pay all the rent payments. 

Probably something I could do now is invest for a down payment, but what else?

That's pretty rare that it would come in under the current price, normally like Jack said, they will give you some type of rent increase, even if it's not the full amount you requested.But it's a completely different existential debate about Section 8 and whether they're really that much more high risk than traditional cash tenants.  

I’m trying to get into single family home real estate and I have been trying to get a feel for the type of cash flow involved.

Can they pay their rent in 2 payment or 1 lump sum.

Well the cash outlay is pretty minor.

basically if its TRUE RV there needs to be on site manager to collect payment when they roll in for the night and most RV parks also have amenities that need tending

The main draw was the elimination of the ACH fees that tenants pay and FastPay rent payments.

You can still find positive cash flow and the 1% rule here and there's amazing appreciation potential.

Unfortunately, the cash-on-cash return isn't the same due to the interest rates.Should I proceed with the purchase now, or wait for interest rates to decrease before re-entering the market?