No issues, and no hassles at all. Your Income is also not taxable with an LTR-P visa. All above board and nothing hidden. In the grand scheme of things, if you travel back and forth living here half time or whatever, it's still cheaper than obtaining a Non "O" or "OA" visa over a ten year period. Easy to file the annual report as well, instead of doing 90 days, but if you travel in and out an annual report to immigration will never truly be needed. No extra fees either