And dangerous. 

When these young people get married and have kids, will they still want to live in a city that sis becoming more dangerous, more dirty, with housing that is more rundown, with fewer new apartments being built?

That's insane and dangerous to believe it is possible.

The business operates in the taxable realm, but you can capitalize the business using retirement funds without penalty and can be involved in the operations of the business - including drawing a salary.I bring the ROBS plan up more to cross-reference some of what you may be reading on the internet and to draw a distinction between that option and the arms-length, tax-sheltered nature of a self directed IRA.  

If you don't have a good deal hard can be dangerous, but if you have an amazing deal with tons of equity hard lending can be helpful to close a deal fast.

You can't charge for ESA's/Service animals UNLESS 1) the breed increases costs via your home insurance carrier or HOA (you can pass the increased cost difference down to your tenant, if they do not accept, you can deny); 2) the animals cause damage to the property; 3) The animal is a danger or is a health risk to other Tenants in the bldg. or to you if you live in the bldg. i.e. animal has bitten someone or allergies or animal is poisonous, etc.; 4) Animal size is too large to accommodate i.e. a horse, a 200lb. dog in a single room rental.  

Unfortunately, there is a disconnect between Mortgage Underwriters and the actual distinction between the two. 

The LLC only deals with protecting you from personal liability -- sort of like prevents you being held liable or arrested for the acts or crimes of a relative (the llc) who is legally distinct from you. 

Before buying your first home, getting your personal finances into a stable position is extremely important, but even more so when dealing with dangerous CC debt.

The danger is if the mortgage defaults, the bank can foreclose on all the condos, which is why I don't invest in coops.