Can anyone recommend lenders who will allow for getting a mortgage in the name of an LLC for purchasing a mixed use building in Philadelphia.

In general the IRS does not allow married couples to deduct home mortgage interest on loan balances above $1,000,000 ($500,000 for single).  

They also have a free service called rentalizer, that allows you to enter any address and if they have info for it, they can guesstimate how much you may get as a AirBnB landlord.There are a lot more sources and blogs dedicated to this, so a search on google for "airbnb best markets" can give more details.Hope this helps!

Ozone is an unstable and breaks down other organic molecules and makes the smell disappear.

Assuming you live in Sacramento, CA and your lease allows for it, I would be airBnb'ing the sh*t out of that apartment.

Account Closed rolling over your $75,000 in your 401(k) plan into a Self-Directed IRA would allow you to avoid the "dummy tax" and let you use the funds to purchase real estate.

In my town, we have what's effectively considered "allowed non-conforming properties" which are exactly like you discussed...multi-unit buildings in single family zones, etc because of grandfathering.

I don't know if this is allowed... but I just bought a 63k house in IL and used Busey Bank.

RT1 allows for up to 2-family properties.

This would allow you to defer the taxes on the sale whether you treat it as your personal residence or an investment property.