Design for high density 2-3 stories 50 du/ac - Micro-apartments?

[Nicholas B.]

Is this post better for the development forum?

I have a 2.2 acre lot that is zoned for as much as many as 115 units when factoring in senior housing bonuses.

I'm considering micro-apartments,  a mix of mostly 500 square foot junior one bedrooms. I have some very small existing units on the lot that work well.

Questions:

The typical general estimate on build-outs for something basic is 75/ft hard costs. However those numbers are going to be for more normal sizes units, around 1000 sq ft each. Any rough idea of the additional $/ft for smaller units? 

Building larger units averages in the higher costs of kitchens and bathrooms into the cheaper cost to build square footage of a bedroom or living room. On the other hand, kitchens in the micro-units will be smaller - only 12' of kitchen per unit.

Any online site that gives examples of 2-3 story multi-family lot layouts that comes close to 50 du/ac? Or any online source for multifamily on smaller lots? I've seen very little that comes close to this number of units per acre without going to mid rise and that's not an option.