Have you raised the rent or did any upgrades to the property.

If you think that you will raise rents on a long term tenant, wrong.

Potential to raise rent or otherwise increase revenue? 

That's awful, you can always add improvements to raise rents, but if property taxes are killing everyone it seems hopeless to try to cash flow.

I should have raised her rent a little each year to begin offsetting some of my losses.

Also in raising the capital and presenting this to some investors should I be focused on presenting the ROI only or are there other metrics I should use as well?

Did you mean that you don't expect the rate to raise before Aug, so it should not affect me?

Take the best one or two and close on them letting the others know you already had others accepted so they can move on to another buyer, negotiate seller financing or a sub2 purchase, or raise more capital to close on them all.

RoofFoundationPlumbingElectricalAC/heatIf these are in good shape, then focus on the points raised by @Cooper Bert.

For example:- Buy a 4-plex for $100,000- Invest $10,000 per unit ($40,000 total) to turn it around- Raise rents and/or re-rent units, get full occupied, season for minimum time needed by refi lender- New appraisal at $180,000- Refinance at 80%, or $144,000.