The blocks yes but the factory internals on a steady diet of it not. The RB26 will do it for a while then the ring lands will compress. The factory pistons are not as strong as people think they are, neither are the rod bolts. Remember the RB25DET block is NOT as strong as the RB26DETT block, nor is it going to handle the same power levels.
Also I have no idea what these items cost in the states either.
RB25DET
I did some new figures and here is what will give you what you want on a limited budget. The items with ( * ) are a must. I have put what they cost here in New Zealand but I would suspect you can get them cheaper in the states. Also halve the price for currency converting.
Fuel pump * ( Bosch motorsports $450)
Fuel pressure reg * ( Nismo $300 )
Front mount * ( Second hand 600x300x100 $1,000 )
720cc inject * ( Second hand $850 )
ECU * ( Second hand link $500 )
Pistons * ( JE forged $1,500 )
ARP bolts for the bottom end * ( $900 )
3 1/2" exhaust * ( Custom $900 )
Pod filter ( Apexi "best" $450 )
Turbo a Trust GT35 or equivelant ( New $3,000 )
Electronic boost controller ( New Profec B $800 )
External wastegate * ( Trial $1,100 )
Now if your lucky and paitent you may find good deals on the net in Japan and import the items yourself. Also again I am sure you can get items like JE pistons cheap there as we pay double duty plus mark up on them. Same with the fuel pumps and ARP rod and main bolts.