Permanent recurring revenue.

Installing a ventilation fan is still the better solution but vent it through the side wall or the roof. not the soffit. 4.Glass blocks are good and permanent solution but can be expensive.

While there are fairly standard square footage install rates for many services in most areas, most of what is involved in a rehab is priced per man hour required.

The more recent EPA lead paint rules require that for pre-1978 construction, that renovations be performed in a lead-safe manner by certified professionals (and even that requirement does not impact owner occupants who are DIY, since the DIY owner occupant is exempt from the requirement).

This does not make the problem permanently go away.

Why is no one here giving actual numbers on what is being thrown out - for instance premiums and the impact of say dropping your property while keeping your liability?

In the scenario you posted with a $1,000 rent monthly and a total PITI expense of $750 then the mortgage cost would be a "wash" and you would see a net impact to your debt to income ratios of $0.00.

But, if you want to get your feet wet first, then Tax Lien investing, depending on the state, can be a good entry point, but longer term I think you can find much larger returns, more liquidity, lower tax impact once you invest in real property.

Personally one or two deals may no impact me, but it might my contractors, their sub-contractors, my property managers, realtors, etc..

It would be different if you were making a permanent move.What is your parents position on their payments?