That is the point of an ASIC it is a F1 car compared to a Porsche.
most members here knows this basic fact, even i who have zero FPGA/ASIC experience. some of them cook FPGA for their life. so are you basically asking backers to pay for F1 cost? or how much fraction from it? good luck asking for Porche cost. once your "module" is completed and shipped to backers, then what? what they have to add to the module to make it a usefull scope? 10GSps ADC as we've worked out the cost and source for you earlier? or the ADC is implemented in your project too, as odgen hinted, you have a bright future to take down some of the big names if so. we have a hope and you are our hope, good luck!
Year ago you...
comparing between PHP and VHDL which one is the F1 and which one is the Porche? just a side joke to release some tension.
i was just as enthusiastic, built my own FG because i dont like the taste and price of existing FG/AWG. built a crap grade Arduino Logic Analyzer, and it just went poof when i got a $10 knock off salaea LA, now with a $100 Uni-T AWG bought, i can put my diy FG at rest. i asked in forum how to deal with GSps memory pipelining, and thats it, i never continue further when thinking i maybe just wasting time and money buying wrong (expensive) parts by mistake that i have no clue about. thankfully my day and part time job have struggled enough to reward me with some old high end gears, one member are also nice enough to donate me one of them as well, so the crave for enthusiasm settled down a little bit. i still have this funny idea for GHz SA and VNA man

there are more to tell about the dream but i dont feel like typing it all, i may just wasting my time here, simply short... it was the time.. i should concentrate on building my dream printer or CNC machine, because they are 5 digit price (with proper spec) and there is very slim hope that someone will come up with cheap knocked down alternative. or maybe i just keep working hard and just buy them off the shelf when i have enough money

we always trade time with money but if i have money i will save time. yeah, sometime its chicken and egg problem. <end of useless mumbling>