Before you go buying stuff, spend some more time reading and researching your options. This site and most of its membership are a real goldmine of information. Although your volume isnt large, if you keep at it, over time investing in ability to recover your solvent will pay for itself. If you go CLS route, I would just get a 1LB column. More batches can give you oppoetunity to learn, dial in your technique, try different stuff.
Here are a few threads you should read before making a purchase:
Outside of Rotovap cost, there are some advantages to ethanol. Check this thread out where TheLostBiologist lays out his Bucket Tek SOP:
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But even if you like the ethanol approach, you should absolutely check out OTSS diamond thread