EB5 Green Card

I was in USA on h1b for 11 yrs until august 2019 as senior software engineer and moved/transferred to Canada on September 2019 as software development manager, managing 5 direct reports plus 4 second level reports with the same company in USA and Canada. And now promoted as Director, software development projects support and maintenance, before completing one year as manager. Have I-140 approved and priority date is 2012 july.<br>

1.What is my success rate of getting L1A<br>
2. Also need to re-apply my green card in EB1C, do I need to be in USA or when I am in Canada my company can apply for this. And upon EB1C I-140 Approval can I get L1A and move to USA<br>
3. Is this the correct time to apply EB1C in the next couple of months when 1 year completes or should I wait for visa ban to complete.

I am 38 year old Banker working in Doha Qatar, I have 16 year old son studying in 10th grade in Qatar, Recently I came across radio advertisement from Dubai that to avail Green Card I need to invest 500,000/- USD with projects of those construction companies stating that within 18 months I can avail conditional green card and within the next 24 months, I will have permanent Green card. My investment of 500,000/- USD will be returned back after five years without any interest or benefits. Once I will have conditional green card , will my son be eligible to get admission in US universities under Local student fees structure and not international fees structure.

Is it possible to file EB-5 with 200 cash & 300K secured promissory note to be paid in next two years against Indian property?