To save $1080, your tax burden increases plus you'll get to take less depreciation while you own it.I've had great results not getting a buyers agent at all.

I am in full agreement that a positive cash flow is a very important goal, due to the fact it insulates you from gambling on appreciation, equity, and rent increases. 

My question is, if I were to buy a property for 70k with an fha loan ( 2.45k down) spend about 10k in repairs, increase its value to 100,000 would I be able to refinance out of the fha loan to a conventional loan without having to live in it for a year?

For me all this money is being spent on essential repairs; not one penny will increase your rent.

Once the renovations are completed and we get a tenant moved in, and lease signed the revenue will increase by approximately 37%, so I want to go back to the bank and get a new appraisal to determine a new value. 

Unlike single family homes, if you increase the NOI on an apartment building, you have instantly increased the value of the building by a nearly exponential amount (exactly how much depends on the going cap rate for the area).

It's more tedious and time consuming but it substantially increases the odds of the tenant buyer actually closing on the option don't you think?

There are several approaches to doing lease options, and consequently, many variables... so it would be prudent to do so to 'maximize' the exposure, pre- screen the largest number of applicants, increase the likelihood of 'closure' (selling the property) with the tenant buyer(s) and structuring the deal, to optimize your ROI.

I have found that using the color palettes from the paint companies is 10 times better than trying to choose paint colors individually.  

As @Jason DiClemente suggested you would need a higher rent rate to accommodate the increased mortgage payment.