I earned my salesperson license to help my investing.

As usual, don't expect to earn a lot when you start out - prove your worth.What are you doing right now with regards to learning real estate?

This does not factor in monthly servicing fees (which would reduce your effective P&I payment), or one-time fees related to for the purchase itself, loan boarding , etc. 

She'd love to have monthly payments vs a lump sum then loose 25% to cap gain taxes since her cost bases is near zero.This is the pitch:  offer to give her asking (if its really worth that much) but she'll get much much more from earning income on the interest on the balance.  

Earned about $100 per month.  

I have driven to property to discover that the maintenance appears to be deferred, even though there is a "manager/maintenance" person there with reduced rents.

You either have lots of money to pay for mistakes and learn from, or you learn beforehand and reduce costs to save money.Obviously there's a lot more to starting than just that, but you'll have more questions as you come closer to looking for deals, start the buying process, and so on.

Great earning experience.

First ask him if there is any other way  he can do the job, cutting out some non essential things.Then Ask him if there is anything you can do to get the price reduced in exchange for your labor.   

Yes, they could always sell it to someone else, but they have to convince someone to buy it and there's no guarantees if it's poor quality, so again there is an extra incentive to put in extra level of due diligence care.B) Your money starts earning right away.