@Alex Bosworth report on Feb 19, 2019 that his node routing more than $10,000/month and getting paid 0.25% for routing if you buy hardware for $150 and routing more than $10,000/month you can have ROI after 4 months (lucky case)
0.25% = $25 on $10k you better not have more than 6 channels or else closing 4 channels each month to reaggregate will cost you 4x$3 to open and 4x$3 to close ($24)
so good luck operating a route with only 4 channels and breaking even