The pipes in the house are relatively old and the house was winterized and thankfully there have been some very minor but fixable leaks, however, the radiators look like water has come out of them I cannot tell if they are in good shape and the technician said the only way to know is when you hook up the boiler.

Experienced investors (@Gino Barbaro can pipe in here as he did a no money down deal, I think) rarely come across such gems and even then they've put in the time, effort and money into having a system through which they can take this deal without putting any significant capital down. 

A notice clause that can be submitted by either party.If you force them into a 12 month lease, they will still leave whenever they want and like mentioned above, you will just chase them in the courts for your money which can be exhausting unless you work with a good collections attorney.If they are not paying on time and are not clean, get them out sooner that later!

I'll have to take photos tomorrow to properly illustrate.The neighbor also said that the mainline water pipe had several leaks in the past and has pictures to prove it.

I don't think you need a plumber as I think of plumbers as fixing broken pipes, not rivers. 

Yes....1925 home...been renting for 3 yrs....double rental...2300.00 for house and cottage ...having old piping issues.and some roof situation. ..had lived there my self....had whole house lifted....has gone up 10 percent in value....just at a standstill now....plumbing 1925...not sure but may be looking at 10 grand or more...don't know whether to keep...sell....or use loan of some type....thanks for your inputs....

This means around the 1st of the year there is a temporary boom of unqualified renters entering the market and to make matters worse the temperature normally drops tremendously which increases the danger of frozen pipes or high utility bills (choose one or the other) insurance agents tend to frown upon vacancies... 

When we pull permit for the additional bathroom, inspector delay signing due to some minor things like incorrect pipe material for the bathroom, electrical sub-panel is not up to date, central air heat certification needed, etc...

It's a grind and it's exhausting, but I think I'd go crazy without it.

That means no lead, no cast iron pipes, no asbestos, no rubble foundations, no undersized fuse panels.