Landscaping is sort of an annoying cost and even if its something we have to deal with in the real-world, we understand if you don't want to bother with managing turf growth in your transport sim. If you're not looking to overpower the system and make money useless to remove this particular nuisance, here's a top notch mod to think about. It targets the cost of landscaping and specifically removes that cost while leaving everything else intact.
Credits: FX2K
http://steamcommunity.com/id/FX-2K/myworkshopfiles/?appid=446800