I am an aspiring serial house hacker based in southern New Hampshire actively searching for my second small multifamily deal in the Nashua area, but I've hit a wall with inventory being so tight in my local market.

The precise property forecast can vary depending on a lot of factors but the general demand is really what you should use the tool for to make your plans. 

Has anyone used the DIY tool, and are there risks?

So many tools and resources at your fingertips in these forums, podcasts, and tools.Jared

If you searched the forums as stated you’ve noticed that it’s been asked EVERY time this question is asked.

They make a trim removal tool that is a like saverDoors can be weird and no house is square and plumb 

Consider starting small with house hacking a duplex or triplex, and use tools like the BiggerPockets Rental Property Calculator to analyze deals.Good luck!

I’m totally new at this so searching for advice.

I've had a long career in community development and have a lot of bank contacts that would likely be interested in investing, but I'd need to prove the concept first with an initial fund (there are also a lot of other community development tools that could be leveraged to maximize and scale this).

BP has various tools to help you analyze your deals (rentals, flips, wholesale, etc). : https://www.biggerpockets.com/investment-calculators7.