These two methods seem to be the easiest path to 800+. 

With fresh paint throughout inside and out, brand-new roof, dual HVAC systems, updated water heater, stainless steel appliances, lighting fixtures, outlets, countertops, and PEX plumbing just to name a few.

For those that rely on traditional methods and personal experience, I can understand this perspective.

Quote from @Kar Sun: My tenant's lease is coming to a close and I am relieved she will be moving soon.She has been paying on time but has been extremely unpleasant and rude.While the money does not smell my mental sanity is more important than money in this case.She sent me a registered letter stating that she feels "unsafe because we have not done the fixes the way she wanted it".She requests to have her witness for a walkthrough.In my state a walkthrough is required but I am not about to grant it to her to bring any witnesses as that is not in my contract.If she feels unsafe she does not have t be present.I also do not treat a final walkthrough with a tenant as a final sign off.This walkthrough does not include a detailed inspection of the plumbing and the appliances that will be done after she departs.This is simply for the visible cosmetic issues and should take less than 1 hr.  

@Ramada Evans yes that is all on you....you can go directly on airbnb/vrbo and do a search by the enemy method for houses that are similar to yours in size and bedroom/bathroom. 

Look for homes with updated systems—new plumbing, HVAC, roofing, and windows are essential for long-term value and tenant satisfaction.

You mentioned a career change, I think going into the trades like plumbing and electrical are great and you can make good money doing those, but I think you may be taking on too much by trying to do that right now.

The paint is chipped so I'm assuming there's lead paint and there will likely be asbestos and lead pipes for plumbing.

The payment method in the original post of this thread sounds like a half scam!

Could it be a BAD investment strategy AND fraud in the disclosures, method of marketing securities and or providing misleading information?