What strategies can I implement to maximize rental income from my first property, which I intended to convert into two units ( Unit 1:Main house, Unit 2: Basement sun room) but cannot due to zoning restrictions? 

It's an unwelcome encroachment caused by a neighbors' lack of maintenance or poor tree placement, but I'm the one that has to hire someone (at massive cost and difficult access) to cut deadly branches that are 100' up? 

The resources and people you have access to is amazing.

They can give you access to off-market properties such as foreclosures and bank-owned properties.

Are there less expensive ways to get access that are still effective? 

Without the address and access code I don't have to worry about that. 

You are making a lot of assumptions on accessibility and ease of install.

The problem is that they searched for liens and judgments but didn't really do a full title search for things like restrictions (e.g.

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I plan to build a 6 unit multi-residential building on the back of the property in the next few years which most likely will complicate keeping the current SBA-HEDCO loan due to restrictions of the loan.