I have my eye on a large single-family residence in Bethlehem, PA, but I have yet to acquire financing.

my condolences on your recent lost.there are a few ways you can do this, as mentioned above you can take a heloc on your primary residence which will give you a second mortgage, first mortgage payment wont be impacted. you can do cash out refinance which will give you one mortgage and payment. it will pay the old mortgage and give you money in your pocket to pay for the rehab.or you can do a renovation refinance which is similar to cash out refinance but we would contractor involved  as part of the refinancing and they are paid through the loan

Investment Info:Single-family residence fix & flip investment.

Just be sure to clarify that she isn’t a leaseholder but is authorized to reside in the unit.If you’re concerned about liability or want more peace of mind, you could ask the primary applicant for additional security, such as a higher deposit, depending on what’s allowed under Colorado law. 

Normal mortgage rates are in the high 6's now, for a personal residence, and higher for an investment property. 

.- Bigger area rug. 9x12 for King, 8x10 for QueenBedroom 2- Change location of TV to across the bedBedroom 3- This bedroom needs an optimized layout-If it’ll fit, scrap the bunk bed and do 2 twin beds along window wall with a table in betweenBathroom 1 & 2- Wall mounted blow dryer- Wall mounted body wash. shampoo, conditioner dispenserPatio- Scrap mini golf for fire pit seating for 6- Install canopy shade- Better design for photo-op wallOverall, great property, great location.

If my target would be low income residents, are there any grants, tax credits, or funds available to help me with the conversion? 

I currently own a 1 bed 1 bath single-family house as my primary residence.

. :)This is especially true if you rely on furnishedfinder.com as your primary lead source (which you shouldn't, but that's another post) as when you make that connection with a prospective resident, you are selling yourself as a landlord as much as you are the property as a place to live.

Or turning your current residence into a rental and buying another primary and living in it until you can rent it to cash flow.