Check into it, it's very durable, easy to install and they are coming out with some very attractive wood look designs.

Don't be surprised if outside people who do illegal dumping are attracted to your dumpsters.

Many times the competing units in the area will lack that attractive detail, which can stick in the minds of prospective tenants and create a slight competitive advantage.I'd recommend exercising your own intuition to find the renovations most suited to each property and area.  

No septic design on file, common for this small NH town.

First, I recommend you concentrate on properties that YOU find attractive as an Investor, rather than trying to work out why other Buyers might like to pay you more than you Contracted, for a property that hasn't particularly appealed to the Investor-in-you in the first place.Consequently, finding a Lender who will "cover" you by lending the money to you IF you can't track down another cash Buyer before "closing" time, becomes a win-win for both Plan A (Wholesale) and Plan B (Buy)! 

If you sell you'll be looking at around 6-7% to sell with commissions and closing costs.Are you in a desirable area that will attract high-end tenants?  

I use quickbooks for accounting but feel there might be some advantages to using software designed for PM.

From a sellers prospective, You will attract every newbie wholesaler in existence.  

If you're talking minor cosmetics then likely it's not a big deal and maybe you will see some increase in monthly rent or at the very least, you will be able to attract a higher quality tenant.

Different retail tenants would find one or the other attractive with their business models.Look around in that area and see if any new projects are slated and is it starting to change positively.