Firstly, welcome to the camming world and the forum!
I'm a member (not model) and very regularly frequent a certain non-nude model's room. We sometimes discuss the pushy people that constantly try her to break her boundaries. She has mentioned people coming in for as long as a month even and acting all chill, even asking for just chat and no tease in a private every other day... and then wham-- they flip the switch and decide to try and be pushy/rude. Don't let any amount of tokens make you break your code. You'll get a lot of requests to do many things, many of which you don't like. The request itself is standard since people don't always know your limits automatically, but if the person isn't cool with you saying 'no' to something, they simply aren't fit for your room.
Things to consider:
1.) He may be 'rich' and giving you gifts / tokens now. (I'm speaking from a token site perspective aka CB, just since that's mostly all I know.) However, there's almost always a bigger fish that comes along that is richer.
2.) Even if he tips you a lot before hand, once he gets what he wants, there is a good chance he won't tip at all, or he'll tip a lot less.
3.) Even if you're fine with showing him something extra for a price, realize that unless there is some deep level of trust (something hard to achieve on a camsite), you never really know if he is going to share that 'something extra' you did with the rest of the internet, or try and trade it around. For all you know, he may take it and try and turn it around to threaten you with sharing it around. Even if you show him for a crazy price, are you ok with taking the risk?
There are some site differences with non-nude models. For instance, I've heard people tend to be much more chill about it on MFC, but on CB, you tend to get more pushy people. It's something to keep in mind-- there will be a lot of very pushy people, or people complaining, or people even ganging up on you to say what you 'should do' or how you'll never make it. The ban-hammer will probably be used pretty frequently, especially when you start. I frequented the non-nude model's room from the very beginning, and the first two weeks or so were absolutely brutal. I've even been PM'd one time by a random dude trying to say to stop tipping the model so that she'll feel more desperate and feel more pressured to go nude for money. Like seriously, there are all sorts of people out there.
You'll need a thick skin to stick to your guns, but you got this!