The house was flagged a nuisance property by the city due to neglect by previous owners, so I pay a guy $70 per month to cut the grass and cleanup any trash.I have that property listed off market in Market place forum currently as I’d never turn away any profit.

If a neighbor complains to the municipality that a nearby property is a public nuisance, is there any recourse?

Narcotics cops would love to get good intel without having to do a long-term surveillance.Also, if you notify the landlord and they fail to take steps to remediate, you may be able to sue them as a nuisance property, depending of course on local laws.

Only time I evict is if they are causing nuisance to the neighbors or have destroyed property.

You can require the pet to be under the direct control of the owner at all times, droppings to be picked up immediately, and not cause a nuisance or danger to other residents.

Naturally, these properties had a litany of code violations, and the city was applying great pressure on the owners to sell, going so far as taking the owners to court for maintaining a nuisance, and having the owners enter into a plea agreement to transfer ownership to new owners within 90 days. 

How do I find a sponsor that would allow me to learn and ask questions without me feeling like a newbie nuisance!

They should be able to tell you the nuisances of raising rent and also point you to the state and/or city department that regulates housing. 

So either what they are seeing when they get there (the nuisance neighbor, the neighborhood in general, the landscaping) isn't worth it to them or your qualifications are too stringent.

They also constantly remind you the consequences of not having your property up to code and of having it become a nuisance property.