The National Renewable Energy Lab makes free software called SAM that you can use to estimate performance & savings of solar panels- their download link is here (https://sam.nrel.gov/download), and they have instructional videos here (https://sam.nrel.gov/webinars).

After slogging it out with GroundBreaker we gave up a few years ago and decided to build our own software which we now can offer to folks that does what is needed from an issuer's perspective.  

@Yaroslav GolubevI received my degree in software development and even I think that: a) this is a tall task, b) there'd be more effort in creating such an application than just writing the SOW yourself.

I need YOUR help.My current stateI am a full time Software Developer making  $58k a year (~27 dollars an hour). 

I also have access to financial data through software, we use App Folio and the reports are very detailed.If you are wary of your company, send out surveys to tenants with questions about the company and have them send back to you.

So I have been working on my own modeling software and would love input.One thing I am trying to come up with is an accurate way to quickly look at an OM and determine if I should move forward.

Assuming an ARV of $1M, and an LTV of 80%, and a repair budget of $100K:Purchase price:   $700KRepair costs:       $100K     (look at private money or FHA 203K loans)All in:                    $800KARV:                     $1,000,000 Here are the current loan limits on Los Angeles FHA loan:https://www.hud.gov/sites/dfiles/Housing/documents...High-Cost 2018 FHA Loan Limits 1-unit home : $679,6502-unit home : $870,2253-unit home : $1,051,8754-unit home : $1,307,175I think the important thing to do here is to submit an offer ASAP with an inspection contingency of a minimum of 14 days, with 45 days to close escrow.

I don't know what would be the easiest way to track things, through accounting software or just save everything, organize it at the end of the year and give it to the accountant.

In exchange, you get to submit offers in his name with his POF.

Be sure to know what is required for your jurisdiction.Our rental criteria is written and available for prospective renters to view prior to submitting an application to rent.