Not all lenders offer HELOCs on investment property but you can find the ones that do by calling around.

I've been doing this for 20 years, and I still think buying existing properties is the best option.

I have been trying to sell the house for six months, initially listing for 710K, but I haven't received any offers.

Are there any options for lending I'm not aware of?

Check in with @Joseph Chiofalo for some construction financing options.

Depending on what you are wanting long term the househack is a great option as well and depending on your situation you might be able to also keep your house in Salem and buy up here. 

With AI streamlining processes, these homes are becoming more affordable and customizable, potentially offering a dream come true for many.But here's the question I have for all you savvy real estate investors: could 3D printed homes become so commonplace in 15 years that they significantly impact traditional US real estate prices?

We love that you want to "hotel hack" and I hope you took Noah up on his offer in the BPCON roomie forum.

Who has used batchleads and would you recommend them or a better option?

If she offers additional information that resolves the issue, then you can consider whether you want to try again.