What it costs Indian passport holders
Transport is the big line item and it is the same for every nationality. The shared van runs from 1,000,000 to 1,200,000 VND per seat, which makes it the default for solo travelers. The private car runs from 3,200,000 to 3,400,000 VND for the whole vehicle, which suits couples, families, and anyone with luggage who wants control over the stops. For two people the car is already close to the van on price.
The visa side for Indian passport holders has two parts. The Vietnam e-visa costs 25 USD for a single entry or 50 USD for multiple entries, paid online to the government, and that fee covers the full 90 days, not a single run. The Laos visa on arrival at Densavan costs roughly 30 to 35 USD in cash, and that one you pay every time you cross, because you buy it at the border on the day.
On top of that, bring cash for lunch at the border restaurants, around 50,000 to 100,000 VND per person, and keep small notes for the stamping fee on the Laos side. Nothing at the border takes a card, so carry US dollars for the visa counters and dong for everything else.
Total the day up for a solo traveler on a shared van and you are looking at roughly 1.1 to 1.5 million VND in transport, Laos visa and food, before the e-visa fee. The e-visa at 25 USD is about 625,000 VND for a single entry, and at 50 USD about 1,250,000 VND for multiple entries, both around 2,100 to 4,200 INR. Spread over 90 days, that is a small monthly cost compared with flying to Bangkok or Singapore for a visa trip, which costs a flight, hotels, and two full days.