You will probably need to call the city or  county planning and zoning office and meet with their administrator.

Here are three articles that made it into the papers:"Addiction treatment group buys building in Main South, fueling neighborhood angst""Spectrum Health Systems adds property in Worcester as it moves headquarters to Westborough""Main South neighborhood remains on edge about planned drug treatment facility"I find it ironic that no one asked me (the listing agent) how the owner of the property chose Spectrum Health as the buyer.

Sellers who do not plan to purchase another home or do not need to assume a new mortgage to buy another home, such as investors, second-home owners, or those with enough equity, are in an even better place to capitalize on the growth seen over the past several years without regard to today’s higher financing costs stemming from higher interest rates.

it is ok to buy a primary once a year if you plan to rent your current and buy a new one . many lenders will not like it being in the same area 

I would not plan on refinancing after a year... unless you are adding massive value during that time. 

From there you can submit plans/permits, and from there you can begin your rehab.

Any recs on companies that help form LLC formation, business structure and estate planning services?

Look at the neighborhood trends, amenities, and future development plans.

I'm working up a business plan now would love some more thoughts and opinions.1) Who give grants for this kind of thing2) I have checked with zoning, I'm thinking about doing something like a Affordable daycare, Offices for Native American Council (Building does have cultural significance), Grounds for Pow Wows and redo the gym in there for community event. 

Plumbing company doesn't have a payment plan.