However, if recent presidential elections are any indicator, don't put too much stock into early predictions.

Also, I am confused about section 179 election to expense. 

Making S-corp. election would be different story, actually it could reduce your tax liability since you won't have to pay SE tax on the entire earnings but only on reasonable salary corp. will pay to you.Contributions to 401K can only be made with earned income, so if there is no income - you won't be able to contribute. 

My goal for the 2020 election is to get it changed.

Being a small commercial property, financing was difficult so I elected to pursue the initial cash option. 2 of 6 units vacant labels the property as distressed to many banks, as I don't have the economy of scale working in my favor.

For investment properties, it appears that my clients are all writing off ALL mortgage interest and ALL property taxes.Primary residence, they are writing off interest on the first $750k and zero on property taxes (they are already at the $10k SALT cap).Our President is a real estate mogul, lo and behold tax reform didn't hurt real estate investors at all.

Most coop (and that particularly true for non Manhattan coops) are practically companies ran by unpaid volunteer amateurs...a coop is a company which own a building and then lease it's unit back to shareholders...in many case you'll have a school teacher board president with an art director as a treasurer...great people with very little experience in running a company...5.

.~ Only 3.6 months’ supply of homes in inventor (balanced market is five- to six-months.2019 NEFAR President Jeanne Denton-Scheck said, “The pace of home sales in Northeast Florida is rapid, and a great situation for sellers, while buyers are having to be prepared to move quickly when they enter the market.”

For example, if I were to sell a property and net $50,000 profit, could I elect to exchange $40K of the proceeds towards a new purchase, pay short-term cap gains on $10K and keep the balance? 

I have been looking at different structures such as MI LLC owned 100% by a Delaware Holding, or just an LLC electing C Corp tax so we don't get taxed in our country of resident (Morocco).