As long as the borrower is current with taxes and insurance and continues to live in the home as their primary residence the lender cannot call the loan due.

If you intend to borrow $ for your house hack then start talking to lenders to see what's required to qualify for a loan.  2. 

I figured to up my 401k and borrow against it in the future

I think insurance will want you to replace the electrical, and if you're in Florida, they make you change the hot water heaters if they're older than 15 years.You're buying on pro forma, but you're borrowing on actuals.

Every other borrower has the right to declare bankruptcy when they find they can't repay a debt but the ones who signed a paper back when they were 19 years old.

@Khayla WilliamsI strongly recommend against borrowing 100% for a propertyThere is significant risk in owning real estate including section 8 and maintaining the home in a certain condition and if you do t have the funds for those repairs you could lose it all.I always recommend people budget and save enough for a down payment and reserves before getting into their first property.

@Craig FoxWhen you say $100k equity is that borrower-able equity?

I had to rip out a long stretch of concrete in a fix and flip gone bad (I was the lender and took it back after the borrower defaulted).

That's not worth it.So many people push investors to borrow against their equity, borrow from grandma, borrow, borrow, borrow!

My "rehab affiliates" work with four different banks in the area lowest amount borrowed for a rehab we did was 18,000 purchase + 25 rehab, highest amount just approved by same bank last week was 450,000 purchase and 200,000 rehab money.