I feel that MLS is not accurate because not all property managers put them in. 

- You or the PMC can get 3 bids, but who is going to know how to accurately compare them and understand if something is missing - that will require more work+charges once the project has started (a standard tactic by many contractors!)?

That is accurate for ARV conservatively.

It won't be 100% accurate, but it will be close enough.

If you are like me, you are shocked and in disbelief that figure is accurate.

Besides putting together the best SOW using accurate/actual quotes as @Peter Mckernan and @Alan Asriants commented above, another key aspect is tracking expenses (bookkeeping) and monitoring the budget throughout the project. 

Is my accountant accurate in stating I cannot deduct the expenses related to the property if it's not listed in an LLC?

You really should be able to hone this in close and pretty accurately. 

The real estate agents who are knowledgeable and doing a lot of deals each month will be the ones who can get you these accurate numbers.

Was your post accurate or a mistake?