Your homeowners insurance may have exclusions for specific breeds, so there is nothing you can really do about that to my knowledge.  

I've never heard of such an exclusion and there are millions of homes with cast iron drain pipes.

Taxable social security and tier 1 railroad retirement benefits.Deductible contributions to individual retirement accounts (IRAs) and section 501(c)(18) pension plans.The exclusion from income of interest from qualified U.S. savings bonds used to pay qualified higher education expenses.The exclusion from income of amounts received from an employer's adoption assistance program.Passive activity income or loss included on Form 8582.Any rental real estate loss allowed because you materially participated in the rental activity as a Real Estate Professional (as discussed later, under Activities That Aren’t Passive Activities ).

Howdy @Lee CruzThere are as many reasons to not use the BRRRR strategy exclusively as there are variations of the strategy itself.Example:  I am fairly new to REI.  

It may look like it has the same coverage, but it's not the right fit.A vacant building policy can have exclusions in the policy that will exclude claims related to rehabbing. 

Because the Capital Gains Exclusion was enacted for Home Owners just before I bought my first House Hack Investment Property.When you add a National Law that exempts you from paying Capital Gains on profit of up to $500k after owning for 5 years, that is so ridiculously pro-real estate back in 1997 when property values was so much cheaper, that good Real Estate really had only one way to go, UP.This Law was written 2 decades ago when the average home was probably not even $200k.

It would fall under Section 121 of the Internal Revenue Service ("121 Exclusion") where you can exclude up to $250,000 in taxable gain per owner if you have lived in the property for at least 2 out of the last 5 years. 

There are companies (google search) that do exclusively do this. 

That's the wholesaler's stock in trade.Wholesalers are almost exclusively untrustworthy. 

They also have "pre-existing conditions" that are exclusionary; if the water heater fails but it doesn't have a particular attachment, it's an exclusion.