Don't want folks thinking I am hanging my shingle out there...

Just because the roof isn't that old, doesn't mean there aren't worn shingles or hail damage spots.

you have to take off the roof, raise the height by building up the framing then redo the ceiling and roof truss plus shingles I don't think a crane would work

20yr or 30yr shingles?

If damage to shingles how old are shingles?

She's wondering what the best brokerage is to "hang her shingle" on for training.

Being a broker, besides being more expensive, also has other obligations and liabilities (especially if you're going to let agents hang their license under your shingle).

Robert, use the tools on the site to run your numbers and to make sure that the rent will cover all your expenses. 150 amps is more than enough for a SFH, i wouldn't change that and the roof, if its a 3 tab shingle, you have another 10 years at least, the pipes i would be Leary about, but like you said, if its not broken don't fix it, that can run you some money, especially if all the pipes are in the slab. the reason they have been there for 25 years is because of the rent, i would raise it but keep it a little lower than area rents, always good to have a long term renter.

Wind storm came through and damaged the shingles, so my insurance company just put a new roof on her!  

The roof had three layers of old shingles.