This could cost around $500 to $1,500 per unit, depending on the size and complexity of the project.Certifications: There may be additional costs for certifications (such as HERS ratings) or third-party testing to verify the energy efficiency of each unit.For a 90-unit project, you could be looking at costs in the range of:$45,000 to $135,000 for energy modeling and certification (depending on the cost per unit).For a 112-unit project, the costs would likely be:$56,000 to $168,000 for similar services.Tax Credit Calculation:If you meet the energy standards, you can claim up to $2,000 per unit.

At the moment, our data is only available for Philadelphia.

That puts any of their data sets into serious question.

I am a little weary since I haven't done that before- not sure it would be enough to get me into buying portfolios or larger complexes though.. 

The art is in accurately projecting numbers, which is notoriously difficult.Forget complex investing strategies as someone new to RE. 

Balance data with personal priorities.

What adds complexity to our plan, is that we live in Minnesota.

The owners of 100+ unit complexes are not individuals who will be swayed to sell by a good offer or the need to cut short term losses.

Perhaps I have an odd case but I paid $1.35M or $455 / sq ft for a 3,000 sq ft duplex on a 7,000 sq ft lot in Los Feliz.Once I add the ADU complex, which will be around $350K, it will be a quadplex, 4,600 sq ft of living space. 

I have rental data, analytics, and entire market analysis in Reno, NV.