And, if so, it needs to be done before you start working together.Warning: partnering with someone you just met at an event is dangerous because many of these people are incompetent or dishonest or both.

Yes there may be fewer of them and they may take longer to find, but there are out there. 

For one condo we had for rent last year at this time, we got 2 or 3 calls per week when listing it at the same price as surrounding apartments with fewer features. 

You have to give “reasonable” notice unless emergency repairs are needed and giving notice would lead to further damage to possessions or danger to tenants.

I used to do that stuff but, got to dangerous.

Key search phrase is "syndication".If you bring in someone active, fewer problems.  

It’s probably a more specialized niche that fewer people can do though.

Releases or discharges of the liens must be negotiatedwith the Comptroller of Public Accounts.Municipal LiensCities have the power under certain circumstances to assess property owners and to file the liensagainst properties, including: (i) paving liens; (ii) weed liens; (iii) dangerous structure liens; (iv)utility liens; (v) plumbing and sewer liens; (vi) swimming pool liens; and (vii) clean-up liens.The requirements and limitations of each of the types of liens is determined by applicablestatutes, as well as the priority of the liens in relation to other liens of record such as tax liensand mortgage liens.

I want to spend the least as possible" is a dangerous mindset."

The danger in the event of them redeeming is that if you did substantial repairs during the extended redemption period you may not get reimbursed.