I would probably talk to or send a message to the downstairs tenant to let them know that although they may not be breaking the rules, their noise is carrying upstairs and for them to just be conscious of that fact when they are up late.

For example, I’m doing three side by side duplexes and it’s costing me $135 psf, but I had to spend an extra $10k per foundation because of bad soil, and the smaller the property the higher the cost psfI’m working on a 28 unit with elevator, demo required, green roof, and it’ll cost me around the same psf as the duplexes.I’m doing three side by side triplexes which are full renovations, basement digout, all new facades, and that’s costing me about $106 psf for construction Non of these numbers include architecture, geotech, MEPS, environmental, utility plan, or finance costs

About 25 years ago I purchased an auto repair facility out of bankruptcy court that had an environmental problem.  

Both of these avatars are very cost conscious.

Do not get it.If you really want to Learn Lease Options, search up REI Conscious on youtube.

This is the norm on the forums...not the norm for sophisticated LPs (who perform credit checks, run TLO reports, track sponsor performance over years and decades, have attorneys review PPMs, review PPMs and OMs and discuss them with peers, negotiate more favorable LP terms for investing at scale with a group, have access to institutional opportunities that have minimum investment levels in the millions, validate rent rolls with comps, validate purchase and exit cap rate assumptions, analyze rent and exit cap rate sensitivities on IRRs, analyze submarket demographics to validate revenue, analyze the sponsors total portfolio risks rather than just the deal, understand the debt terms thoroughly and have a conscious position on what debt fits the LPs risk profile...the list goes on and on and it's not a checklist approach / it's investment analysis that requires qualifying the property based on extensive knowledge of the asset class and additional work qualifying the sponsor.

Bought an auto repair shop for 30% of value because of environmental problem.  

But I'd be careful with any long term forecasts (economically, demographically, environmentally, etc.).

Open shelving is also an affordable way to add a trendy, airy feel without a complete overhaul.Energy Efficiency: In many cases, energy-efficient appliances can add significant value and appeal, especially with eco-conscious buyers.In terms of consistent winners, I've found that shaker-style cabinets, subway tile backsplashes, and quartz countertops perform very well across different price points.

Chances are you don't want to buy a building that had PERC spills and EPA just chomping at the bit to hit the new owner with environmental cleanup costs, that might be way more than the building is worth.