I'm a retired engineer and have been successfully using income from these houses to support my retirement without dipping into retirement savings.I'm transitioning my business from rentals to a franchise and would consider selling one of my houses (5 br/4 ba - the other houses my son while he's still attending).

That is too high and after "reverse engineering" the calculations.

On the other hand, pros include increased cash flow, engineer-based data for the clients CPA, audit protection (with the right firm) and the ability to deflect that recapture fee with a 1031 transaction.

Who are their architects, engineers, and contractors.

However having developed many subdivisions myself I was able to work with my client ( who is a very experienced civil engineer that did projects in NYC) So determined that with the base zoning it was not a matter of if it was how many and how  long to get approved.this is probably one of the top 10 markets in the entire US for new builds you would not have Toll brothers there if it was not.  35 minutes or so West of Dulles and all the high tech in that area..

I would suggest one or both of you go talk to a Civil Engineer and ask if they can see a way to accomplish what you are trying to do.

By and large, QI's have very high ethical standards, and are sometimes overlooked as the engines of this tax saving tactic.]REPUTATION MARKERS 📊INDUSTRY STANDINGMembership in professional organizationsLeadership roles in FEAEducational contributions to the industryRelationships with major title companiesCLIENT RELATIONSHIPS 👥Testimonials from CPAs and attorneysReferences from title companiesLong-term client relationshipsTransparent fee structuresRELATIONSHIP RED FLAGS 🚩Overly familiar with your realtor/brokerKickback arrangements (illegal!)

No, DIY is not the same as a virtual site visit or a study done by engineers @Dana YobstAs @V.G Jason said, you could very likely cost yourself more in time and money.

They wont let a diesel truck operate in the state with an engine over 10 years old , because of emissions .

It's a big money maker for architects, engineers, and contractors, but not a huge opportunity for investors, nor should it be.