build another base and don't let the dev reach 1000. that way, you can use it as storage, and never lose your resources to attackers.
my current storage base has the following buildings and units:
-1 (Level9) Headquarters.
-3 (Level3) Shelters.
-3 (Level10) Resource Depots.
-1 (Level1) Command Post.
-1 (Level6) Robot Factory.
-1 (Level1) Hall of Hero.
-1 Hero : Laserbeak.
-20 AeroTransports.
AeroTransports require (Level6) Transport research at any tech center.
[Tech Center research applies to all bases.]
With all of that, you should have approximately 350 dev, and safe from attacks!