Do you think one should spend money on his internet marketing plan?

If you are referring to this as a marketing tool then it is very important.You find and connect with all the business people here and it is the easiest and most efficient way of connecting.It is thus wise to spend on this internet marketing plan,very noble

yes of course  advertising is one important way to bring customers into the website or store front you should only spend what you can afford

If the product needs marketing via the Internet, there is no harm in this thing

i do not think it is much wise to spend money on internet plan, yes if the size of business is good and you want to reach as many target audience then it may help you.

Planning your marketing is very important, before investing any money on internet. Spending money on internet depends on what you want to achive after sometime. 

A reason to market your business online is not because everyone else is doing it, but because of the following reasons (amongst many others):

• Over95% of consumers use online media before making a local purchase (source)
• 90% of Internet searches led to a follow up action like contacting or visiting a business (source)

Ask yourself a Question, Where would you advertise a Football shoe for young and energetic football players. On Newspaper and Magazine, Or Facebook and Youtube ? 

Outbound marketing days are almost over.

There are two phases of everything, opting internet marketing network depends on the size of business house and products.

Yes it would be benefical to opt for internet marketing but it should be very specific and targeted, now a days established corporations do use the artificial intellegence to raise the percentage of consumers.

The budget should reflect what the company is willing to spend in the short term in order to grow in the long term. 

How will your product/service reach the desired audience if you do not market it. And if you want to market anything effectively then you need to be there where your audience is, and so if your aundience is online (as of today almost90% of all audience is online in some form or another) you do need internet marketing else you can definitely do without it.