I tell my agent to write the offer, and he says "OK, but before we make an offer, you need to understand that the entire house has galvanized steel plumbing, which will fail.

Hey @Sean Steele welcome to BiggerPockets!

I've hardened them with steel roofing and skirting, and better floors.  

This is essentially the formula everyone is using now in the apartment space, and I think for your B and C class rentals this is perfect. https://www.homedepot.com/p/TrafficMASTER-Khaki-Oak-6-in-x-36-in-Luxury-Vinyl-Plank-Flooring-24-sq-ft-case-185312/206934038

They could each choose the path best for them - whether to sell and take their portion as cash taxable, do an exchange on their own for that 200K portion, or band together with one or more and do the exchange on that portion.  

D Rule 506 (b) and a Regulation D Rule 506 (c) offering.

B and E OR TRESSPASSING NEVER PERMITTED BY LAW ENFORCEMENT. if one can prove sufficiently to a cop that they dont belong in house, they get removed.

Especially where I am, in the Steel Valley, there is huge value in the fact that my great-grandfather moved here to burn coal for Henry Clay Frick in Clairton.

I think the reason many investors go these other routes a to b and b to c, is simply because they don't feel comfortable in just telling c that they are in business and that they are making a profit.

I have receipts. lolTwo ways to do the mail1) print everything at once and rubber-band them according to the day to mail.