Difficulty seems to have stabilized around ~430 now which is fine as long as mining is consistent on the network. Here's the latest block.

I can't think of any reason Florincoin wouldn't run on this device considering the FLO blockchain is quite small at the moment and the codebase is almost exactly the same as LTC. The only difference is this guide is quite old. I would follow the instructions on our github page here: https://github.com/florincoin/florincoin/blob/master/doc/build-unix.md and also make sure you use the correct FLO port numbers according to your florincoin.conf configuration settings (not the LTC port numbers) if port forwarding is necessary.