Buying house for Section 8 rental 3-bedroom with in-law apartment

[Lana Ly]

I am planning to buy a single-family 3-bedroom house in my area (South MA) to rent to Section 8. Currently, there is a 3-bedroom house with in-law apartment on the market for the price of 3-bedroom. Do you know if there will be any problems with the in-law apartment to rent to Section 8? Will it be counted as a fourth bedroom? It has its own bathroom and little kitchen plumbing. (it can not be divided into multifamily due to house configuration).

Would it be more wear and tear with the big house or is it better to buy on the smaller side?

Also, when you look for a single-family investment property does the size of the land matters? 

Any advice is appreciated.

Thank you.