Ok,
My answer assumes US Dollars so i'll give this a shot:
A new A2000 tekmagic 060 accelerator new from softhut is $479
A new Gvp spectrum gfx card from the same place $169
X-surf 3 ethernet card $140
Used scsi cdrw off ebay... ~$20-40
New 80 or 68 pin scsi hd off ebay (use 80 or 68 to 50pin adapter ) ~$20-40
80/68 to 50 pin adapter from ebay ~$10
4-32MB 72 pin simms for the tekmagic accelerator (internet) ~$30
misc. cables,terminators,shipping,etc ~$20
I'm sure i am forgetting something..but as it stands,around : TOTAL:$928
options below would change the price:
might consider a indivision ecs scan doubler if floppy games are important $112+ship from amigakit.com
For just a little more than the x-surf you could get a deneb USB card and run ethernet(buy a dongle off ebay) from it,and have the benifiet of usb ,allowing mice,keyboards,usb sticks,usb dvd/cdrw's : $160
A picasso IV gfx card is the holy grail of amiga gfx cards,but it will cost you an arm,leg,house and maybe your car if you can find a used one

you could put a low power,fast compact flash card on the tekmagic as a HD if you get a scsi->ide bridge and cf adapter. scsi bridge isn't cheap and is anywhere from $20 used to $100+ new.
Lotsa money to put into a zorro2 machine,considering z2 does what 2MB/second to the gfx card etc. zorro3(a3000-4000) does at least 12MB/s,not blinding but you see the difference.
Don't get me wrong,it will work just fine,but personally,if you intend to spend the money you mine as well go for the best you can get.
theres many other ways to answer this and configure your machine so google is your friend,seach them out

Mike