When I did my first house hack in Columbus I showed very low income on taxes. 

Will the title company put this property under our LLC name, and won’t be required to legally inform HUD/tax authorities. - will it influence property taxes once we move to conventional loan in 3 yrs? 

If the signs point to selling, consult your CPA about the tax implications.

After 20+ years in real estate partnerships, here's what actually puts you on the IRS radar (and what doesn't):REAL Red Flags That Matter:The Partner Complaint TriggerDisgruntled partner files Form 8082K-1 disputesPartnership disputes leading to tax filingsReal Impact: Instant IRS attentionSuspicious Loss ClaimsLosses exceeding investmentArtificial basis inflationSudden large losses without economic realityExample: $100K investment claiming $500K lossesRelated Party GamesCircular property flipsBelow-market transfersFamily partnership schemes without substanceWatch Out: IRC §267 and §707(b) violationsDebt Engineering Red FlagsBasis inflation schemesArtificial guarantee arrangementsPartner debt shifts near year-endCritical: IRC §752 compliance matters!

Home went to tax sale county kept excess proceeds.

. $418,000 @ 3.125% on a 30 year fixed is $1,790.61 - what is the remaining $1,171 - taxes and Insurance?

Quote from @Fred Scott: Sunrise Capital Investors - Mobile Home Park Investment FundI've seen a few posts about them here but none of them actually talks about what the actual annual returns have been.They are advertising heavily for passive tax deductions which is fine but what are the actual returns over a period of (say) five or ten years?

Easy to use yourself too HELOC works (there may be some places that do a HELOCs on rental properties)I personally have used a 401k Loan on a few occasions - You're essentially borrowing money from your 401k and paying yourself back (interest goes back into your 401k as opposed to a bank) and if you don't pay your 401k back the loan would simply become a withdraw (maybe some tax penalties, but you could probably finagle a workaround).

Do you know if that could work the same with something purchased at a tax auction?

Companies choosing new locations look for these key factors:Metro population over 1 Million: Companies require access to a large, skilled workforce and established infrastructure.Low Crime Rates: High crime deters both businesses and residents.Low Operating Costs: Companies prefer locations with lower taxes and fewer regulations to maintain competitiveness.Low Risk of Natural Disasters: Companies avoid areas prone to natural disasters that can disrupt operations.