I would include in your future offers that you want sellers to show proof of lead cert, if not have them pay for it as a part of the sale if it is not present. 

The modest purchase price, combined with an ideal renovation budget, presented a prime opportunity to improve the home’s market appeal.

In general, if there's nothing in zoning or the deed restrictions prohibiting the division of the property, it's mostly just getting it resurveyed and presenting the new subdivisions to the local government (county usually) to have each lot recorded as separate parcels.

And in many cases this may be warranted as health and safety issues may be present.  

If you're not present to let them in (or have the space occupied for whatever reason, etc.), they should be notifying you and you may have to face any repercussions (penalties, pauses on your permits, etc.) 

Present the existing tenant a PDF with all of the rental comps and Rentometer printout showing what the market rent is.2.

Appraisers are not going to add value for something that is financed or leased, and if you're the only house in the radius of comps with paid off solar they won't have any comparisons to derive value from it.In the end it is really only advisable to pursue if you're going to own the home forever....while it is nearly impossible to determine if you'll own forever or not regardless of present circumstances.  

Pursuant to what @Drew Sygit just said: the last building we bought, there was a tenant there who got in by misspelling his last name and never presenting any ID.

@Jaime RamirezYou should share the listing so we can review how it is being presented.  

If you ever find an opportunity because of your knowledge of the market, you can present it to your new connections.