I was left with an excessive water bill ($10k) at my 4-unit property as they failed to fix a water leak, which I complained about once I noticed a spike in the water bill.

Its going to be a new client for me the Savvy agent.Also your going to see a huge spike in wholesale deals that we all know are basically illegal unless they double close.

For whatever reason: anything from changing market in this neighborhood or this entire area to another Covid lockdown to another spike in interest rates.c.

Millions of homeowners would then be underwater on their mortgage - owing more than it is worth - and would likely foreclose / declare bankruptcy, creating a credit crisis, unemployment would spike to 10%+ and on and on… No, no the price of homes, and really everything we pay for, is here to stay.

Home prices remaining elevated despite rapid interest rate spikes is a very good indicator for how out of balance the market currently is.

Inflation might cause prices to spike but some taxing bodies might not need to raise taxes for MANY reasons.

For example, I think it would be nice to have a 20 year spreadsheet for LTR showing 2 roof purchases at the 10 and 20 year mark (assuming 10 year roof) and then each system listed with its expected respective replacement year to get a picture of potential capex spikes,This may lend to moving replacements expeditures around to balance the outlay of capex dollars over the life of the property.Thoughts?

As we get out of a recession, interest rates fall, production increases as demand increases, and the spike in production generally pushes material prices down. 

This year, real estate investing has really spiked my interest.

I'd ask to see a breakout of costs and try and see where the costs have "suddenly" spiked.