HMM dats'A tuff one.... i dout that your fishing purchases would add up to enuff to shut down the shrimp bizz.... but i can see your consurn, maybe try handgrabing,lol no gear but a glove and stringer, teasin`ya, cuz i wouldnt go putting my hands in holes down there either....... also if you have a lic to comercial fish i would think any gear you buy could be a tax right off.....this could almost let you buy more gear if you are showing a loss but having a great time with great gear...
also search every fishing product maker i bet there is one who does not support the same desire to spend money on shutting you down....of course you could use all pink gear with proceeds going to breast cancer, but not sure where they stand either...lol
sorry i cant help more....
i would also plead with everyone on here to eat more shrimp...lol!!! shrimp and scallop gumbo, corn bread and a cold beer....mmmm