Tub was cracked due to not being supported. 2) No access panel required by code for the pump, the pump was in the rear of the tub buried under the tub deck. 3) No thermostatic anti-scaled mixing valve required by code for the roman tub filler 4) No dedicated circuit for the pump required by the manufacturer, the electrical for the tub was piggy backed on the vanity lights 5) no GFCI protection on the tub as required by code  6) no grounding of the tub motor as required by code 7) ABS drain glued to PVC drain pipe with ABS glue 8) the tub valve connections  uried with no access were IPS threaded stainless steel flexible water lines instead of hard sweated copper connections, (lost count on all the shark bites they used, they must buy them in bulk) 9) all the tile was tiled directly on the plywood of the tub deck, no underlayment to prevent the tile from being popped and the grout cracking from moisture getting to the plywood...the list goes on and on.. oh and the tub filler valve was located on the back side of the tub, not a code violation but certainly not user friendly for somebody to have to climb basically into the tub or over it to turn the water on, but that's minor in the scope of all the code violations and poor workmanship, that's just poor design. 

So many questions.Is it manufacturing suits, office space, retail, etc.There are many factors but mostly you look at sustainability.How long are the leases, would you be able to cover all expenses and pay yourself?

Two manufactured homes currently on the lot and zoning would allow for mobile home park.

I am a 23 year old engineer with a degree in Manufacturing Engineering Technology.

We are partial to Mobile Home parks and migh suggest learning a bit more about them if this is of interest to you, then join your local manufactured home industry association in your area.  

Even if We know that Bayou City is facing the oil slump very hardly, but there niche and part of the town that still performing well because are occupied by different types of professionals figure that are working in sector like maritime transport, medical, manufacturing and distribution.My suggestion is to study the market, contact a local agent, read the news, and then make your decision based on real number and real prospective and area development.Once again, depending everything on what Submarket your are going to focus.

In many parts of the US, manufacturing and similar jobs are going away and what remains are service sector jobs.

Do not, do not, do not allowed someone who is not a licensed professional to install the furnace, it will invalidate the warranty.The warranty should be able the same from every manufacturer, so you're pretty much even there.I wouldn't necessarily recommend flex duct, it is cheaper, but you can end up with integrity issues, even in the short run.My best suggestion is to find an HVAC supplier, and check to see what the prices are for furnaces ... this will absolutely open your eyes as far as material costs are concerned.  

have seen homes on similar size lots go for around 150k. the land is just sitting there for several years going on decades. the shrubs seem to be well on their way into growing into trees; is there like a service that clears lots for a fee, or maybe it would be more cost effective to put a (manufactured?)

The property is a huge piece of land with a 1990 manufactured home.