Hi I'm Quite new to this forum and have learnt a lot in the last few weeks so thanks everyone, but i have a question about buying miles and MFU's

It seems to be cheaper to buy miles and upgrade into CW than just buy the CW ticket, but what happens if a sale is on does anyone know it it remains cheaper this way, or but CW and upgrade to F on MIA route.

Looking for more flights for the summer to TPA MIA or MCO or even direct to GCM the MIA seems the best option as there are more dates and seats.

The reason for asking this now is it seems you can only buy 19000 each in each calender year running Jan to Dec is that correct? We have a household account so i can buy 4 lots (does anyone ever make up more members of there family so they can have upto 6 lots?)

Should I buy some now just so i can buy more next year or not bother?

thanks
JJ