It sounds like you need a business plan that addresses all of the above on a project and stakeholder [you and the investor(s)] level that includes a cashflow that will be used to measure financial performance in terms of ROI, ROE, IRR and so on.Good luck in your endeavors and please feel free to reach out to me if you need a bit more meat on the bones noted above

I am looking for a cloud-based tool where we can manage expenses, calculate taxes, roi, roe and cash on cash returns.

Getting a site permitted is the 1st step in the development process and can be the most profitable from the standpoint of ROI/ROE and done in the shortest time compared to subsequent steps (construction, leasing/sale, operations).

Start with what you can house hack then 1031 the ones you accumulate to roll the equity into larger deals to keep your ROE return on equity where you want it.It sounds like you're doing all the right things!

I think I'll be happy with 5% ROE.

Also, your expectation in the movement of future rent prices (the numerator in the ROE formula) compared to the movement of future home prices (the denominator) can alter your calculations. 

My guess is your ROE would be low for either one of those scenarios and it would be better to sell than hold onto it unless you have an emotional attachment to the property.

However I would hold onto it longer and do a 1031 when your ROE gets below the return you can get if you sold and redeployed that money.

Can they calculate metrics such as CoC, IRR, cash flow per door, and ROE? 

That is up to them, but you have to serve them 21 days prior to sale or the sale can be overturned or canceled.