No, it is entirely correct, you do allocate it across those activities or you will allocate it to one. 

In a perfect world I would recommend you allocate money both to your IRA and towards your real estate projects, but if putting money into your stocks hampers your ability to use money towards your real estate, then stop putting money in your IRA, at least until that is no longer the problem.  

If you paid $150k you would allocate 70% of that $105k to improvements and capitalize/depreciate that. 

Sub-metering can be a cheap way of allocating costs to each unit, but you usually have to leave the master meter (the city's meter) in your name, making you responsible for the water consumption.

I cant bid another home after that because all my funds were allocated for that check/bid)I noticed some of the bidders that bought multiple homes, had stacks of checks.  

It all gets allocated to basis and then you deduct based upon the 2/3 etc.

Just make sure to allocate it and get it working right away.  

In the past I have allocated much of my time to acquisition, renovation, and management of residential projects.

I would like to allocate business expenses across the properties and track individual unit expenses within the multi-family homes.  

However, how much value can you reasonably allocate to the trees?