purana kagaz,
i didn't think it can cost that much too, as comments above. but lemme put it and see :
basically i wud put it as :
1. sun/gahana ; etc :  depending upon how much tola of gold stuffs for dulahi, and other related primary relatives ( i think u need to buy for some more ppl !) : 1 tola is now 40 thou..so 10 tola wud be 4 lakh for eg. tara 10 tola dherai nai ho..
2. kapada:  keta ko lagi : kati jor suit ani aru kapada (upon you), costs depends from 8000 to dunno know 20, 30 +(if u go for branded)..3. kapada : keti ko lagi : bridal dress, etc..tannai dinu parla yeha chain ( :)..u can discuss..again sari can cost 25 thou + and so are designer kurtas....may be 2- 3 lakh (bihe ko lagi, pacchi ko shopping ta it depends)
4. venue (gharmai mandap bhaye kuro sakiyo)..janti liyera keti ko ghar gayo.kuro khattam :) tara yedi party palace/mandir ho bhane ta ..as s/m said above the costs of party place woudl be included..so nominal cost
5.  Food: yo ta simple hisab as above (depending upon u choose a good party palace) : Rs 700 times no. of invitees ! (let's say 700X 400) bhaneko 2 lak 80 hajar bhayo
BUT
since u wanna go for the best if u choose a : 5 Start hotel (soaltee, Annapurna) or a 4 start (everest) or a 3 Star...etc.. do the maths. (tara hotels pani sud be okay, as its a good busines sfor them too..may be add 300 more : 1000/pax : i.e. 4 lakh
6. band/baja : may be not more than 25,000 (unless u want a celebrity singer or a band !)

yo bhanda aru kharcha chain ke hola ra ?

hunewala dulaha lai badhai cha :) bhaye pachi yeso hami lai pani idea dinus hai saathi.
good luck