magkano po kaya rough overall estimate going to vietnam for 3D2N?parang plan ko po from Friday to Sunday lang then dapat makauwi ako para mag work ulit ng Monday. thanks 
hi sis, i went to vietnam as a backpacker. bigyan kita ng estimate based on my trip pero exclude naten ang airfare ha kasi this varies. if you take advantage of promos, you can get as low as 3k for a round trip.
you can go to hostels. hostels are great place to meet fellow travelers. mura lang din magstay dito at karamihan included na ang simple breakfast. sa saigon, cheapest i know is $5 a night. meron $6 a night, sa PP backpackers sa Pha Ngum Lao area. the latter is what i recommend.
pero if you want your own room, go to a guesthouse, cheapest fan room on low season (feb to oct) - $8, with AC $10.
I dont like staying in sa hotels kapag i travel as a tourist kasi tutulugan ko lang naman yun, baket magbabayad pa ako ng mahal.
Food in Vietnam is gastronomically orgasmic and inexpensive. Try the local food. Per meal I guess pwede ka mag budget ng $2.
Tours - eto yung medyo mahal. A day tour sa Mekong Delta is $10. ask around kasi maraming nag offer neto at paiba iba ang price nia.
So I say, pwede kang magbudget ng mga $50 dollars on tours alone sa Saigon; tunnels, mekong delta, war remnants. sobra na yan.
Shopping, i guess this one depende yan sa budget mo. Pero ako kasi, when i shop sa countries na pinupuntahan ko, i only shop for items na dun ko lang makikita. super mura sa vietnam, so haggle and do the walk away strategy hanggang ibigay nila sayo yung gusto mo na price.
Lets take the max estimate:
Room is $10 x 3 - $30
Food is $6 x 4 - $24 (3 x day for 4 days)
Tours $50
Total is $104 dollars. Bahala ka na magbudget sa shopping mo. This estimate sis is only for one city, either HCM or Hanoi.
Take note that Halong Bay tour price varies. Pinakamababa na nalaman ko is $45 for an overnight trip.