1 Machine with 4 GB RAM for Big Size MySQL Data Size

[muhammad subair]

One of my potential clients want to migrate their application to web based
(PHP & MySQL), estimates of the data size is 24GB and growth per month is
20MB of data.  Unfortunately, they could only use 1 sever machine with 4GB
RAM.

The application used in intranet, just running simple transactions and the
number of users concurent is under 10.

I need information and suggestion about this condition, whether the effort
spent on implementation and future maintenance is not too large for use
MySQL with this condition?

*btw sorry for my English*

Thanks you very much,
-- 
Muhammad Subair