I suggest that you hire a virtual assistant because there is a temptation to cut corners if you hire a link-building agency.
Maybe they know dirty sources of links, and they would mix it with the legit links they send you.
This is especially true if they are operating under a tight deadline.
This is also dangerous because many agencies compete on price.
Do you think you're getting a good deal when somebody promises you a Ferrari for the price of a pack of gum?
If it's too good to be true, it's because it is.
Do yourself a big favor, and retain full control of the link generation process for your brand.
The way to do this is to hire a quota-based virtual assistant.
Many virtual assistants charge based on time, and you burn a lot of cash with very little to show for it.
That's how the game works because they charge you based on their time to do the work you give them.
This means that the longer they take, the more money they make.
How does that work out for you? It doesn't.
Focus on what amount of results you can get for the same amount of time.
That's your bottom line.
And the only way to do this is to hire a virtual assistant based on a quota system.
There are two ways to do this.
You can go to places like Upwork or Fiverr and get in touch with the contractors there and ask them if they would work based on quota.
You hire them through the system, and if they don't deliver the results at the agreed time, they have to refund you.
This works on Fiverr to some extent, but you have to filter many people.
If you don't want to go through that hassle, go to places like LXN or Cognoplus, which specialize in listing people who can be your quota-based virtual assistant.
Put simply, you don't have to pay them if they fail to deliver the agreed results at an agreed time.
There's no advance payment with these systems because you deal with them directly.