Yes, you file your PR app along with a valid LOS (i.e. before it expires.)So what i understand is that i have to file my PR application before LOS expires and that's it. I don't need to pay incubator's fee after filing PR application. Right?
You'll need to speak with the incubator to get details on their fee structure. Each is different. Some take an upfront fee, some allow you to split the cost over several months. Others have a lower fee + equity. If you've opted for one with equity, they become shareholders, so you'd be paying them over the life of your company.
Would advise you speak with your incubator and see what they charge.
The rates for incubators are all over the place.