Is it appropriate to travel to Shennongjia now? What is the approximate cost? Can you help me plan my travel route? Have plenty of time.

It's certainly appropriate to go now. The cost depends on your own requirements. How about consumption. The basic consumption should not be very high, but the price is generally a little more expensive than that in other cities. You should plan your own route. After all, the plan can't keep up with the changes, and it's not necessarily when you have a car. Search some scenic spots online, look at the pictures, mark them if you want, and then follow the map or negotiate with the driver to know how to get there. People you know are the best in the local area.