Pretty good, enjoying a day off for once, writing up a bit for TSPD between AH.com breaks.
To partially answer your OP, the Neapolitans fielded some rather pitiful armies in the 1860s against Garibaldi; I think the largest they could put together as one force was at Volturnus, and that was only some 24-28k (sources vary). Earlier during the 1848 Revolutions Pepe only took some 14,000 volunteers north to join the war against Austria after being initially promised 40,000 by Ferdinand II, mostly due to politics but also, afaik, because at the time 40k was essentially the entirety of the Neapolitan fighting force and would have left the kingdom desperately defenseless. Hell, when Ferdinand put down the revolution at home by essentially laying siege to his own capital he only had some 12,000 loyal troops at his command. Heck when he reconquered Sicily he only used ten thousand men. So I doubt very much that the Neapolitans could field a conscripted army even anywhere near 200,000. Or at least IOTL even when facing certain extinction of the kingdom, they couldn't.
Now, the one thing Naples did have going for it is that it was filthy rich. Doing research for TPSD I discovered that prior to unification the Neapolitans had some two-thirds of all money in circulation on the peninsula, mostly due to its extensive trade contacts throughout the Mediterranean. So the best bet for the Neapolitans would be to have a small but very modern and professional standing army which would be complemented by mercenaries. This seems to be exactly what the Neapolitans did in fact IOTL, but everything fell apart due to the politics of Italian unification and the extensive corruption and tyranny of the later Bourbon government - the regular army became quite unprofessional, being more used to being used as secret police, and the mercenaries were mostly fighting for Garibaldi and Victor Emmanuel by that point.
