If you've got a stringent budget and absolutely bent on getting more than your money will get you, then you need to consider splitting up the tables and the tablescape budget. Half of the tables can get thrifty designs and the other half can get over-the-top designs.
By mixing up the tables and the budget, you can get away with such a pendulum effect of size to the designs. As long as they are designed thoughtfully and are in proportion, then you shouldn't have a problem of stretching your already too-thin budget a bit further.

This picture clearly illustrates, in a beautiful way, that you can achieve high-tower drama at a fraction of the cost because you don't have to dress each table the same way.

Budget Bottom-line:

Large (Costly Design)

$40 Birch Branch

$55 Flowers (per branch)

$25 Flowers (table florals)

$10 Candles

$100 Chairs (rented)

= $230

Small (Inexpensive Design)

$25 Flowers (table florals)

$10 Candles

$100 Chairs (rented)

= $135

+ $47 Misc. (20 percent of design)

Considering you have seven tables at $230 each, and eight tables at $135 each and a combined miscellaneous cost of $705, then your total tablescape budget becomes $3,395, which is less than $5000. Remember, your tablescape budget should account for 10 percent of your wedding budget. It's okay to go higher, but you must make adjustments elsewhere.