Once they get the claim paid a lot of these companies model is to fleece you on the roof.I would not do the HVAC until it is totally dead.

@Halle Hughes, @John Culotta I'm replying on this old post, but am wondering about this business model. I

I am risk averse and if I were to purchase, I would tear down to the studs and do a full rehab {this would include getting rid of asbestos shingles and insulation).1) I have done a ton of research and it appears as if getting rid of asbestos is very DIY able assuming you spend money on the safety equipment and use it properly. 

Flat fee and fee-only advisors don't work off of a commission-based business model. I

I say that no XX year old house is perfect and I will get any health and safety issues addressed but we need to be reasonable, we are not buying a new home.

Dealing with insurance and repairs is secondary to the wellbeing of your tenants and neighbors.Once you've confirmed everyone's safety, it's important to document everything thoroughly.

Safety comes in numbers.

It's been a great market for me.Things to consider when choosing a market; population growth (you don't want a stagnate or declining population), crime/safety (high crime usually means more unqualified tenants and will diminish property value), state property taxes, tenant/landlord laws. 

Car manufacturers go through endless licensing, safety controls and testing.  

I replaced a furnace at a rental with in base model, I don't recall the BTU or efficiency off the top of my head, but it was $3450 so I would guess you are going to be upwards of $6500-8K depending on sizes.