But how do you manage co-mingling of funds? 

I have an old house on an exceptional lot (great street and mountain views, larger lot for area) in an area of SE Denver in which new houses can sell for more than 3M.

@Denver McClure, thank you as well and Semper Fi!

Good evening, I have a SFR in Miami dade county and this is the zoning info from the county website:Land UseMuni ZonePA ZoneGENERALRU-2 5700 - DUPLEXES - GENERALFrom the county website I was redirected to:  https://library.municode.com/fl/miami_-_dade_county/codes/co...and I think the construction of a new unit in the back (There should be enough space)  can potentially be approved based on the exception (3)ARTICLE XV. - RU-2, TWO-FAMILY RESIDENTIAL DISTRICT[19]SHARE LINK TO SECTIONPRINT SECTIONDOWNLOAD (DOCX) OF SECTIONSEMAIL SECTIONCOMPARE VERSIONSFootnotes: --- (19) ---Cross reference— Height of fences, walls and hedges in RU Districts, § 33-11; location of swimming pools in RU-2 Districts, § 33-20(c); maximum setback for principal residential buildings in RU-2 Districts, § 33-45.Sec. 33-201. - Uses permitted.SHARE LINK TO SECTIONPRINT SECTIONDOWNLOAD (DOCX) OF SECTIONSEMAIL SECTIONCOMPARE VERSIONSNo land, body of water and/or structure shall be used or permitted to be used and no structure shall be hereafter erected, constructed, moved, reconstructed or structurally altered for any purpose in an RU-2 District which is designed, arranged, or intended to be used or occupied for any purpose, unless otherwise provided for, excepting for one or more of the following uses:(1)Every use permitted in RU-1, RU-1M(a) and RU-1M(b) Districts.(1.1)Workforce housing units in compliance with the provisions of Article XIIA of this Code.(2)On lots meeting the requirements for two-family use, every use as a duplex or two-family residence, including two private garages.

I strongly suggest you hire a PM co, or at least have someone else deal with them for the " day to day " 

I agree with you that good interior design is a great way to do it.My vacation rentals clients here in Colorado that pay for a designer outperform their competition by 25% or more.

Decision-Making and Communication:How have others navigated decision-making in co-owned properties?

Ed Barone Co-founderRentRedi 

I have one investment property in Tx (former primary residence) and am looking to expand here in Pueblo, Co...

TLDR: I found a seller who is open to a financing an off-market 5 unit multi family home near a major hospital in Denver.