However, with the bonus depreciation (maybe not the correct terminology) it appears to accelerate the depreciation and make the up front savings very significant. 

Starting next year, I’d like to use the property as a primary residence, but I’m trying to take advantage of bonus depreciation running it as STR for remainder of the year and take the paper loss against my spouse’s w2 income.

Once they've proven themselves, consider gradually increasing hours, offering incentives (i.e. bonuses) then lastly, increasing the hourly rate.** These are all rough #'s.

As a bonus, you can use it for your personal record keeping as well.

I am planning to perform a cost segregation study on the STR's I have purchased to take advantage of the bonus depreciation rules currently in effect to offset the tax consequences of leaving some $$ on the table coming out of my 1031 exchange.

Can I do the analysis on my LTR as well this yr in order to use  up the 80% bonus deppreciation allowed for 2023?

The appreciation will be an added bonus and since you can not predict it and control it, do not account for it.

If we don't invest it and take advantage of bonus depreciation or 179 deduction/depreciation, then we'd be paying significantly more in tax after the income passes through as schedule K income and we would not be getting the maximum amount of benefit that we could with a sum of money like this. 

Make sure to verify all types of income with paystubs (or signed offer letter), bonuses, and 1040 or W2/1099.

Cost Segregation just analyzes what you purchased.You don't do a cost segregation on items after purchase because you know what they are and can determine whether they need to be depreciated over 27.5 years or a shorter time period, in which case it would be eligible for bonus depreciation.