Naturally, I too am more inclined to house-hack as @Aaron Lee suggests, but despite if you are able to find a relatively new duplex at your budget, it seems that you'd be putting yourself in a potentially unnecessary volatile situation. 

Hello all, I have a 3 family house in New Bedford,MA and I would like to change my gas space heaters to a forced air system. Does anyone know where can I get help/more information about this? I know a lot of multi fam...

I find that totally false in my opinion.The older demographic is the largest growing audience and most profitable on facebook.

Just to hear some different professional opinions here, what would be your next step if you want to grow but also reduce debt?

For several years, I have self-managed my growing portfolio.  

In either case, if the contractual deadline has passed for negotiating, you can't really do anything but appeal to their good nature.

and to understand how they fit together in your toolbox, as none will give you everything (e.g, insurance is required and it will cover you for many situations, but not always; asset protection (LLC) is litigation insurance and complements regular insurance, by minimizing the target and making it unappealing).If you are a new investor, probably you will not have a lot of assets and/or equity to worry about (but even that is relative and subjective to each person tolerance to risk) so I would not worry about that till you pass that risk threshold (in my opinion 100K+ in equity, maybe 50K if you are really risk adverse) and you should be primarily concerned with finding good deals and growing your business first.

But maybe holding us back a little bit from really growing with now 1 duplex and 9 SFH’s.

https://m.lowes.com/pd/Rubbermaid-Laminate-11-8-in-D-x-47-8-in-L-x-0-625-in-W-Natural-Shelf-Board/4264333

I'm always looking for new partners in various metropolitan areas to grow our portfolio together.Happy house hunting!