By rich I mean they completed an application, paid the screening fee and we show that their income is sufficient to cover all of their own expenses plus pay for rent and any damages at the unit we are renting their child.

Refinancing can allow you to pull out equity, providing you with additional funds to use for the down payment on a new property.Look into financing options for purchasing a duplex.

So will the builder waive his fees?

CAP Rates can be a beautiful thing, they allow an investor to get a quick comparison of properties without digging too deep into the deal.When using CAP rates on MHPs I want to give a few warnings because there are additional variables to consider.

Most REI marketing agencies range from $1500/mo-$5k/mo in fees alone.

Either a flat fee or a % of profit.

Did the host charge the guest additional fees after the booking? 

Additionally, I am looking to learn more about LLCs and weighing pros/cons. 

To help you in your search: be sure to find an accountant who is willing to grow with you, and is not too high priced fee-wise.

Renovating multi-family/condo-conversion (and potential partnership structures for both)I would be so grateful for some qualified advice and more than happy to pay a consulting fee.