After much dithering, pondering, and scraping together of funds, and repeated alterations of plan to maximize the purchase, there's a body of new figures en route from RSM.
Rich of RSM worked with me to make some substitutions on one of their Prussian Artillery Battery bags, allowing me to replace 5 designated crew figures with the Prussian Officer with Spontoon figure. This will give me a small 2-gun battery of mixed weight, with each gun crewed by 3 gunners under 1 officer with Spontoon. A Prussian Officer with Cane will command the battery.
The remaining 3 Officers with Spontoon will be allocated to command the companies of the Lintzer Musketeers. This will give me a battalion organization of:
4 Musketeer companies, each of 6 Musketeer Marching under the command of 1 Officer w/Spontoon.
1 Grenadier company, of 6 Grenadier Marching under the command of 1 Officer w/Spontoon.
Battalion staff of: 1 Mounted Officer, 1 Officer w/Cane, 1 Drummer, 1 Standard Bearer.
Accompanying the artillery batter is one cavalry bag of Austrian Hussars in Busby. These should form 2 squadrons of the Fuchshöhle Hussars. Later, when I can afford it, I'll add a second bag to bring the unit up to 4 squadrons.
Also accompanying these two bags are an additional 8 Musketeer Marching and 2 Officer with Spontoon. By combining these with the 4 Musketeer Marching left from the original Musketeer Marching bag, I can form two full Musketeer companies of the Garde du Corps Prinzessin Gertrude, with a command group of my remaining Prussian Officer with Cane, Drummer, and Standard Bearer.
End result, once painted up should be:
1 battalion Musketeers
1 half-battalion Musketeers
1 half-regiment Hussars
Perhaps down the line a bit, I can eek out the funds to fill out the remainder of the half-units.