A search on BP might even find links for this since I recall posting it previously.One other reason I have encountered in the City of Phila is that the electricity for the fire alarm system must not be fed from a meter that is a tenant meter (since the tenant power could be shut off due to non-payment).I don't think this will run as high as 10K unless you are doing lots of re-wiring.You will need an extra meter; since you say it has four, I'm going to guess you might have to replace the four-meter enclosure with a larger enclosure that is able to handle at least five meters.

It's like pest companies trying to capitalize on the crawl.space enclosure market, research it and you'll discover a wealth of differences.

As we are looking for prop #2 right now, I'll probably try to do the enclosure right before we move into our next property so I can immediately start paying off the cost of the addition with the increased rent. 

Probably a combination of issues; perhaps "fishing in the wrong pond" for subs, a few miscommunications with a quote from a sub based on a description as opposed to an actual inspection,  from an owner that, not being an AC person may miss relevant issues, are these new or used units, did the handler "fit" into the enclosure, etc.  

Bathroom remodels: Remove any bathroom windows that reside inside a shower enclosure.

Sometimes college towns are rad, sometimes they really, really, really suck - especially around football and tailgating season...

The biggest thing I learned (the hard way), if you want something kept, like the existing tile tub enclosure, put that in there.  

Then we had the floor and enclosure tiled which made it look really good.

And now that I've been sent the citation they have the power to insist that I upgrade by building an enclosure for the dumpster as well (new code).

I usually work in the northern suburbs and I almost always replace the tub/tub shower combo with a nice, tiled shower with a frameless glass enclosure.