Alternatively, I have spent the last decade doing technical work in cybersecurity, and can land a job between $140k-$190k (depending on where in the US). 

Technology has changed significantly, but this has always been a hospitality business.

That said, tenants sometimes push for alternative solutions, as in your case.Here’s what I’d suggest:Broaden Your Marketing ApproachFebruary and March can be slow months for leasing in family-oriented communities, but it’s not impossible.

Or of any alternative strategies to make this work?

Quote from @Phillip Austin: There are two alternatives to a security deposit, which I speak about in my book.

In all the above listed alternative investments, there is seldom any discount pricing and you give up control.

If you're looking to househack again, then the conventional 5% down is a very viable alternative to the 3.5% down FHA option. 

Alternatively, you could split it between House 2 and 3 in a way that covers your building budget for the apartment.

It's a 3 bedroom house and we plan to use technology such as a smart lock, WIFI exterior cameras, and a smart thermostat.

I'm looking for alternatives, I liked LandlordStudio actually but I hate the name, seems so impersonal to the tenants and not in their favor.