A few questions before buy, charts, node, async

Hello my friends i am new on the community and new on wappler, i wish to include wappler on my next project but i have a few questions.

1- wappler have charts? if yes this where they get from multiple data sets is included on wappler suscripcion? or is paid extension

2- i want to test wappler for a small project for a client, if i do this project for 3 months and deploy on my server and my client is happy , i need to. keep paying wappler?

• if i dont need, and i need to back to this project after a few other months, can i import the project again inside wappler to keep working? (i have a few projects where they dont need changes all months )
  3- how mature is node on wappler ? do you recommend or php? what ios the benefit of use node?
  4- can i do multiple roles user on wappler?
  5- i need a page where without reloading it show me the charts or other data in “real time” , could be in intervals too lets say async pull data each 1 second.
  6- i am not expert on sql, wappler have built in a database modeler? or i need create ouside and then plug on wappler?
  7- Any good course to make mobile apps using framework 7?
  8- can i use other frameworks like https://coreui.io/ or other css frameworks?
  9- any plan to include the feature of generate reports on pdf and excel?

Thanks you so much for your answer and congrats for this amazing piece of software, sorry if my english is not perfect .
Cheers from Chile.
Thanks you so much, and sorry my english is not perfect, cheer from Chile.
Iván.