For doors and knobs, explain what is normal wear and tear and mention deductions for damages.

More details:Mortgage (principal + interest): $2930/moProperty taxes: $15K/yearHome insurance: ~$1K/yrCost of home ownership/month: $4280/yr (not counting for any tax deductions related to the interest and property tax)If I account for $20K of interest and $10K of property taxes as an income deduction, then I can reduce the cost by ($30K x 35%) divided by 12 = $875 per month = $3400/mo cost of owning the houseRental income after 35% federal income tax + 9.3% state income tax = $2618/month (!!)

This is for tenant occupied or turnkey properties that I want to cashflow, not hold for losses, deductions, or depreciation to offset taxes.

If I am the only one materially participating in STR, can we deduct STR depreciation from my spouse's income if we file taxes jointly?

I discovered a guideline that prevents lenders to loan to Condos that have master homeowner's deductible > 5%. 

I would suggest a few things: 1. don't make repetitive log entries every day " managed rental, did calls" copied and pasted 50 times likely would be thrown out in an audit for example. 2. make sure you are materially participating in your rental activities. 750 hours is not enough, you need to pass the second test of material participation in the rental activities to turn that activity from passive to active and claim the deductions on your active income. 

Just keep in mind ADUs are getting around $50K in value for an appraiser (and may deduct $10K in value for not having a garage). 3.

I told them that I had already paid an extra 3% service fee, which they could deduct from the balance, but they claimed it was already included in the mortgage and could not be used for a refund.Now it seems they are fully scam.how can I do to get my money back, I have lost around $6062 USD for this case.Because it is criminal, can we report to police and get the money back? 

To answer the original question: No you cannot keep homestead, you need to update insurance - it's a few hundred more per year if anything and you will continue to be able to keep your property tax deduction until you purchase another home in Texas you would rather apply it to.

So, on a $1.5M portfolio, I received a $450,000 tax deduction the year I bought the properties.