For a rule of thumb, replacing a commercial boiler can range anywhere from $20k to $150k, depending on the size, age, and efficiency.

In order to defer all of the tax you must purchase a replacement property that is at least as much or greater than what you are selling for.

But it gives you a chance to get a fresh start....make your place nicer, replace appliances, new paint, get rid of carpet and replace with LVP, Etc....

If the sale is for $600K then you need to purchase $600K of replacement investment real estate. 

The “moderate size” question is pure opinion.

“Jorge, this is pure gold—you’re laying out the exact playbook for maximizing every inch of a property’s potential.

If managing it yourself feels unsustainable in the long run, hiring a good property manager could give you more peace of mind.Since a 1031 exchange or like-kind replacement doesn’t seem to be a good fit for your current situation, you could consider a HELOC if you need to tap into the equity for other investments without selling the property, although rates are high so this would eat up your cash flow.

@Jason Dubon I take the cost of all appliances and divide it by 5 (avg lifetime of appliances these days) to estimate annual cost of appliance replacements.

If the roof itself is not covered, you can estimate your out of pocket if the whole roof has to be replaced. 

To ensure my replacement property value is at least $600k, I was considering putting the remaining $100k into a DST.