I just spoke to city engineer they estimated 2880 per unit to install new individual water meter and also mentioned that they don’t do individual water meters for apartments itseems.

No rule of thumb, but most people estimate one month vacancy when doing numbers.

Price estimated at 47,000. 

I was able to get an estimate from a property mgmt company.

Even if you do have a low CTR rate cause you are in these lower positions, the idea is the more auctions you show up on the more chances you have of getting clicks and spending that full budget.Contrary to popular belief, which is just showing up #1 for every keyword, statistically speaking if you only show a couple of times in those high positions you end up getting 1 click and lets say you have a 4% conversation rate your going to have to get a lot of those really expensive clicks in order to get a conversion but if your bidding at a fraction of the rate your going to get a lot more traffic.

Would you by chance have any specific people you could refer me to?

If the Seller never agreed - in writing - to make certain repairs or improvements, then you have nothing to stand on and have to take your chances that they will do what you are hoping.If you asked them to make repairs and they failed to agree - in writing - prior to the negotiation deadline, you have nothing to stand on.

I will say it's better if you owned a multifamily (duplex, triplex, so forth) that way you have less chances of losing your monthly income if something breaks or there's any major damages to the property. 

these quotes are outrageous.. my mortgage broker estimated my monthly mortgage on a $1200/year insurance policy, so everything isd telling me insurance should not be 2600/year but those are the quotes im receiving, any ideas?

Either it's really, really run down, or you are estimating finishes that are too nice for the area.