was helpful, and even with him it took several days to get my issues resolved.

NY laws also require permit filing and permit fees.

I want to stay focused on the issue at hand: when purchasing a $500k property is it normal and reasonable that the seller provide historical income and expense information?

Note - the units without off street parking do have free, non-permitted street parking and there is always space right in front of the houses.

Zoning should not be too much of an issues, but uses may alter parking requirements. 

You must analyze all the data (size of properties, # of properties of each size, location of best producers, regulations, # building permits for that size issued in the last year)3.

Just wondering what the implications are of changing a single member LLC to a multiple member LLC as far as current depreciation, basis, carry forward losses and any other issues. 

There's no benefit to anyone if they can’t rent the rooms, so your interests are their interests, and they're looking out for you - they actually recommended I back out of the first house I put an offer on due to foundation issues that they weren’t comfortable with.

Another reason why engaging an architect early is helpful is to ensure the layouts are permitted from the perspective of code requirements.

Permitting is questioned as well as zoning.