If you're looking to save up for that beautiful Delorean for $4m, make sure you log in every day to GTA online from today, for the next 7 days. You'll get $250k initial login bonus and then $150k each day you login online. Way over $1m easily saved if you're saving up for something. It'll get deposited between 15th and 21st May.
Also, Double Cash and RP on Stunt Races, Special Vehicle Circuit and Contact Missions. Looks like a good week to do FG GTA Races this week
Instead of the Delorean, looking at the deals you could punt for a Bunker whilst they are 40% off or Mobile Operations Center at 30% off.