First ideas about playing solo in the old west:
I chose Pinal County, Arizona for no particular reason. Taking a historical map and adding a two-mile hex grid turns the map into a Boot Hill campaign map.
There is a paper called "Place Names in Arizona" hosted by the University of Arizona that gives some information about ancient places, their date of foundation and purpose. The 1880 and 1890 census adds information about their population numbers.
Everything else then becomes pure fiction, heavily influenced by various Italo western movies and the novels by Karl May.
To play solo in the old west, it can be important to change the level of wargaming. So I want to use four different levels of detail:
1. The men who would be kings for larger engagements with half-size units
2. LOTOW for posse engagements. A posse is more or less a half-size unit in TMWWBK
3. Boot Hill 3e to play a single character or when it is necessary to use work or social skills. Four mounted characters will form a LOTOW-Posse
4. Boot Hill 3e special rules for duels in a final shootout.
Fortunately I own LOTOW the Old West and Frontier so it's possible to field Cowboys, Law Enforcers, Outlaws, Cavalry and Indian posses. Boot Hill 3e is available again on drivethrurpg.
The first goal for now is to set up mathematical formulars that allows a character to be translated into the various rulesets. The next goal is to more or less balance weapon lethality between the different rulesets. The third goal is the calculation and transfer of experience points between the different rulesets.
In addition, of course, I still need tons of terrain, miniatures and buildings...
... of course I already own tons of miniatures, I only have to paint them all