Employees starting their own company

Q: My friends and I are planning to register a company which focuses on construction solutions. Presently, we are working in a company as employees and all of us are working in different sectors. Our employer has several businesses, and healthcare is one of them. For each machine installation, they hire a third party for construction and finishing works. My question is that we are the employees of the same company and now we want to open our own company to be the third party for their construction work. Can we take orders for construction jobs from our company without showing them that we own the third company? Will this be permissible?

Kaffarah for breaking an oath

Q: I'm in a dilemma. Three years back, out of josh I made a bunch of promises to Allah and qasams. I have since done proper Taubah for this. I don't remember whether I promised or took qasam to Allah that I will study my books every day. But since then I did for a month and haven't been keeping that promise or qasam. What is the kaffarah for this? I'm really scared does this count as me breaking the promise or qasam daily or is it the Initial promise or qasam? I went through a very hard time because of these broken promises/ qasams. After my taubah I felt contentment and started practicing again. After my taubah I felt contentment and started practicing again. I know not to make the same mistake. Another qasam I made was not to do a particular sin I did that sin multiple times after that. What is the kaffarah?