Fibre channel HBAs really cost peanuts. Because there's tons on the second hand market and the only ones who want them are enterprises who don't buy second hand shit without a support contract (they usually dump them when the support is up, that's why there's so many working ones on the market)
So I get €300 cards for €20, it's a joke. Really great though because they're really amazing for tying storage together and they can do point to point just fine. No switch needed.
The one drawback is the convoluted software chain around it, I used to work with SANs but if you don't it might require a little investigation :) The client side is pretty easy, the target side is harder (this is the part that is normally covered by a SAN).
But the biggest problem with LTO drives and home use for me is the terrible noise they make. If 3D printers sound like robots having sex, this is more like robots getting tortured.