HELOCs are fine, but keep in mind that you really only want to use 50 percent of less (each) of your available equity just so you aren't creating a problem that you can't solve later if the value of your personal residences fluctuates.If you both have W2 jobs though, have you looked into getting qualified together and just getting a loan, 10 percent down each?

I actually ended up going through a big career change, and attended a 6-month bootcamp to learn Software Development after 7 years cooking professionally in fine-dining kitchens. 

If your broker does not have access to lenders that are fine with SCorp, reach out to me, i have a few that have no issues with this.

Also, if the sponsor is new, I am fine with less skin in the game as long as it is significant to their net worth.

There are many who will argue my methods and that's fine, it's worked very well for me and has been extremely rewarding in ways that cannot be compensated monetarily. 

Whatever you choose make sure to read the ENTIRE fine print of the policy.

I've got a long term tenant lined up & the unit is a non smoking unit, which the applicant is aware & fine with for indoor.

Other commercial and industrial is fine.  

But if it's coming at the cost of your health or something else important than time with your family then it's perfectly fine to step back when you need to.I think this goes without saying.

For weeks/months/years it could be totally fine, without incident.