Cashflow, ability to build a team, landlord tenant laws, price to rent ratio etc.......were all factors in the decision making process almost a decade ago.Now,  I wonder why your approach is an either or view? 

Therefore, your long-term income depends on the city's ability to attract new companies.

There are situations where it is more beneficial to end the current lease and start a new one (ability to change lease terms, rent amount etc), and there are situations where it makes more sense to just do an addendum.

You could put in a range of numbers for purchase price and closing costs, renovation expenses, and expected returns and you could very quickly get a range of projected return on investments (although an excel spreadsheet could easily do this as well), but I'm sure as technology develops we will see even more sophistication in AI's ability to assist in deal analyzing.

I think that the ability to get paid when you need to do either one of those is not talked about enough.

PROS of a Solo 401(k) with no Custodian: 1) Freedom of checkbook control, ability to more easily move funds in and out of a bank account in the name of the Solo 401(k). 2) In some cases, lower fees. 3) Ability to more easily link your Solo 401(k) to bank account systems like rental property management systems, or if investing in real estate syndication platforms. 

He also doesn't control regulations in the states/cities, but his attempts to cut regulations may trickle down and impact personal property rights and people's ability to use their properties as they see fit.

The Sampling Method is typically used for properties with nearly identical blueprints such as fast food chains or nursing facilities.EXPERIENCE OR “RULE OF THUMB” APPROACHThis approach is based upon the specialist’s experience in the industry and their ability to estimate the costs.

Allows you to keep your current portfolio with the ability to access $ to fund projects. 

I have broken down 4 key benefits to a retirement account: 1) Compounding interest in the absence of taxation (particularly with a Roth IRA) 2) Ability to self-direct into alternative assets, like real estate, private real estate partnerships/syndications, crypto, gold & silver and other alternative investments. 3) Credit protection (see state specific laws), but generally inherent protections. 4) Upon death, if setup properly, probate avoidance