Definitely not, IMO, Been there and its a waste of time and money and risk unless you have dedicated plan to take advantage of having it.

We still owe roughly $900K on a 3% mortgage.We’re planning to retire abroad and are weighing two options:1.Sell the home – I already have a buyer lined up, so this would be a straightforward exit.2.Rent it out long-term (furnished) – While I don’t think the rent will fully cover the mortgage, it might come close.

I would say that sounds like a solid plan to me 

Root intrusion is rare with plastic pipe because that means a crack that's going to admit soil as well and eventually bust completely, so if you have roots in PVC you might as well plan to excavate.

I love where you mind is at and how organized your post/plan is.

Putting a long term tenant in a property here that you are BRRRRing won't cash flow unless you plan on leaving a good amount in the deal to do so, but that defeats the purpose of the BRRRR. 

Quote from @Alex Ng: I plan to purchase a property with an executory contract.

Planning to start a complete home remodel (interior/exterior) on a home (currently 837 sq ft), kitchen and bathroom bump out, and add an additional bathroom. 

@Stuart Udis plan A was to reposition as small office and keep it that way.  

if not, how would you plan to pay that bridge loan off before the balloon comes due?